51116231225 has 12 divisors (see below), whose sum is σ = 63397986540. Its totient is φ = 40884043200.

The previous prime is 51116231203. The next prime is 51116231233. The reversal of 51116231225 is 52213261115.

It can be written as a sum of positive squares in 6 ways, for example, as 399840016 + 50716391209 = 19996^2 + 225203^2 .

It is not a de Polignac number, because 51116231225 - 2⁸ = 51116230969 is a prime.

It is a super-2 number, since 2×51116231225² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 105710 + ... + 336759.

It is an arithmetic number, because the mean of its divisors is an integer number (5283165545).

Almost surely, 2^51116231225 is an apocalyptic number.

It is an amenable number.

51116231225 is a deficient number, since it is larger than the sum of its proper divisors (12281755315).

51116231225 is a wasteful number, since it uses less digits than its factorization.

51116231225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 447100 (or 447095 counting only the distinct ones).

The product of its digits is 3600, while the sum is 29.

The spelling of 51116231225 in words is "fifty-one billion, one hundred sixteen million, two hundred thirty-one thousand, two hundred twenty-five".