51521211232 has 24 divisors (see below), whose sum is σ = 101610060552. Its totient is φ = 25715481600.

The previous prime is 51521211193. The next prime is 51521211251. The reversal of 51521211232 is 23211212515.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 51521211197 and 51521211206.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1391569 + ... + 1428112.

It is an arithmetic number, because the mean of its divisors is an integer number (4233752523).

Almost surely, 2^51521211232 is an apocalyptic number.

It is an amenable number.

51521211232 is a deficient number, since it is larger than the sum of its proper divisors (50088849320).

51521211232 is a wasteful number, since it uses less digits than its factorization.

51521211232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2820262 (or 2820254 counting only the distinct ones).

The product of its digits is 1200, while the sum is 25.

Adding to 51521211232 its reverse (23211212515), we get a palindrome (74732423747).

The spelling of 51521211232 in words is "fifty-one billion, five hundred twenty-one million, two hundred eleven thousand, two hundred thirty-two".