251321222315132 has 24 divisors (see below), whose sum is σ = 473726661408000. Its totient is φ = 116278362342576.

The previous prime is 251321222315087. The next prime is 251321222315221. The reversal of 251321222315132 is 231513222123152.

It is a junction number, because it is equal to n+sod(n) for n = 251321222315092 and 251321222315101.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38451836132 + ... + 38451842667.

It is an arithmetic number, because the mean of its divisors is an integer number (19738610892000).

Almost surely, 2^{251321222315132} is an apocalyptic number.

It is an amenable number.

251321222315132 is a deficient number, since it is larger than the sum of its proper divisors (222405439092868).

251321222315132 is a wasteful number, since it uses less digits than its factorization.

251321222315132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76903678865 (or 76903678863 counting only the distinct ones).

The product of its digits is 43200, while the sum is 35.

Adding to 251321222315132 its reverse (231513222123152), we get a palindrome (482834444438284).

The spelling of 251321222315132 in words is "two hundred fifty-one trillion, three hundred twenty-one billion, two hundred twenty-two million, three hundred fifteen thousand, one hundred thirty-two".