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52200031 = 1319132099
BaseRepresentation
bin1100011100100…
…0001001011111
310122020000222111
43013020021133
5101330400111
65102454451
71202456452
oct307101137
9118200874
1052200031
1127513724
1215594427
13aa788c0
146d0b499
1548b1a21
hex31c825f

52200031 has 8 divisors (see below), whose sum is σ = 56271600. Its totient is φ = 48136512.

The previous prime is 52199999. The next prime is 52200053. The reversal of 52200031 is 13000225.

52200031 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 52200031 - 25 = 52199999 is a prime.

It is a super-2 number, since 2×522000312 = 5449686472801922, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 52199984 and 52200020.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52200061) 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 7 ways as a sum of consecutive naturals, for example, 23820 + ... + 25918.

It is an arithmetic number, because the mean of its divisors is an integer number (7033950).

Almost surely, 252200031 is an apocalyptic number.

52200031 is a deficient number, since it is larger than the sum of its proper divisors (4071569).

52200031 is a wasteful number, since it uses less digits than its factorization.

52200031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4025.

The product of its (nonzero) digits is 60, while the sum is 13.

The square root of 52200031 is about 7224.9588926166. The cubic root of 52200031 is about 373.7291045465.

Adding to 52200031 its reverse (13000225), we get a palindrome (65200256).

The spelling of 52200031 in words is "fifty-two million, two hundred thousand, thirty-one".

Divisors: 1 13 1913 2099 24869 27287 4015387 52200031