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53123213 = 1113371491
BaseRepresentation
bin1100101010100…
…1100010001101
310200221221100102
43022221202031
5102044420323
65134340445
71213353113
oct312514215
9120857312
1053123213
1127a94290
121595a725
13b00cb70
1470abab3
1549e5328
hex32a988d

53123213 has 8 divisors (see below), whose sum is σ = 62410656. Its totient is φ = 44578800.

The previous prime is 53123197. The next prime is 53123219. The reversal of 53123213 is 31232135.

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 53123213 - 24 = 53123197 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53123219) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 185603 + ... + 185888.

It is an arithmetic number, because the mean of its divisors is an integer number (7801332).

Almost surely, 253123213 is an apocalyptic number.

It is an amenable number.

53123213 is a deficient number, since it is larger than the sum of its proper divisors (9287443).

53123213 is a wasteful number, since it uses less digits than its factorization.

53123213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 371515.

The product of its digits is 540, while the sum is 20.

The square root of 53123213 is about 7288.5672803371. The cubic root of 53123213 is about 375.9194339416.

Adding to 53123213 its reverse (31232135), we get a palindrome (84355348).

The spelling of 53123213 in words is "fifty-three million, one hundred twenty-three thousand, two hundred thirteen".

Divisors: 1 11 13 143 371491 4086401 4829383 53123213