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52142223 = 372477547
BaseRepresentation
bin1100011011101…
…0000010001111
310122010002200110
43012322002033
5101322022343
65101331103
71202126100
oct306720217
9118102613
1052142223
1127484251
1215566a93
13aa584b3
146cd43a7
15489e833
hex31ba08f

52142223 has 24 divisors (see below), whose sum is σ = 82605312. Its totient is φ = 29157744.

The previous prime is 52142197. The next prime is 52142239. The reversal of 52142223 is 32224125.

Adding to 52142223 its reverse (32224125), we get a palindrome (84366348).

52142223 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 52142223 - 25 = 52142191 is a prime.

It is a super-2 number, since 2×521422232 = 5437622838763458, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a self number, because there is not a number n which added to its sum of digits gives 52142223.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52144223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3136 + ... + 10682.

It is an arithmetic number, because the mean of its divisors is an integer number (3441888).

Almost surely, 252142223 is an apocalyptic number.

52142223 is a deficient number, since it is larger than the sum of its proper divisors (30463089).

52142223 is a wasteful number, since it uses less digits than its factorization.

52142223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7611 (or 7604 counting only the distinct ones).

The product of its digits is 960, while the sum is 21.

The square root of 52142223 is about 7220.9572080161. The cubic root of 52142223 is about 373.5910936951.

The spelling of 52142223 in words is "fifty-two million, one hundred forty-two thousand, two hundred twenty-three".

Divisors: 1 3 7 21 47 49 141 147 329 987 2303 6909 7547 22641 52829 158487 354709 369803 1064127 1109409 2482963 7448889 17380741 52142223