51512255253 has 12 divisors (see below), whose sum is σ = 74606077260. Its totient is φ = 34249432896.

The previous prime is 51512255239. The next prime is 51512255269. The reversal of 51512255253 is 35255221515.

51512255253 is a `hidden beast` number, since 5 + 1 + 5 + 122 + 5 + 525 + 3 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 39044969604 + 12467285649 = 197598^2 + 111657^2 .

It is not a de Polignac number, because 51512255253 - 2²⁵ = 51478700821 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51512255153) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7669008 + ... + 7675721.

It is an arithmetic number, because the mean of its divisors is an integer number (6217173105).

Almost surely, 2^51512255253 is an apocalyptic number.

It is an amenable number.

51512255253 is a deficient number, since it is larger than the sum of its proper divisors (23093822007).

51512255253 is a wasteful number, since it uses less digits than its factorization.

51512255253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15345108 (or 15345105 counting only the distinct ones).

The product of its digits is 75000, while the sum is 36.

Adding to 51512255253 its reverse (35255221515), we get a palindrome (86767476768).

The spelling of 51512255253 in words is "fifty-one billion, five hundred twelve million, two hundred fifty-five thousand, two hundred fifty-three".