321131552056 has 32 divisors (see below), whose sum is σ = 702182700000. Its totient is φ = 137627806848.

The previous prime is 321131552033. The next prime is 321131552081. The reversal of 321131552056 is 650255131123.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 58512481 + ... + 58517968.

It is an arithmetic number, because the mean of its divisors is an integer number (21943209375).

Almost surely, 2^321131552056 is an apocalyptic number.

It is an amenable number.

321131552056 is an abundant number, since it is smaller than the sum of its proper divisors (381051147944).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

321131552056 is a wasteful number, since it uses less digits than its factorization.

321131552056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117030476 (or 117030458 counting only the distinct ones).

The product of its (nonzero) digits is 27000, while the sum is 34.

Adding to 321131552056 its reverse (650255131123), we get a palindrome (971386683179).

The spelling of 321131552056 in words is "three hundred twenty-one billion, one hundred thirty-one million, five hundred fifty-two thousand, fifty-six".