321005132256 has 96 divisors (see below), whose sum is σ = 844481949696. Its totient is φ = 106767936000.

The previous prime is 321005132251. The next prime is 321005132291. The reversal of 321005132256 is 652231500123.

It is a tau number, because it is divible by the number of its divisors (96).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321005132251) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 117111046 + ... + 117113786.

It is an arithmetic number, because the mean of its divisors is an integer number (8796686976).

Almost surely, 2^321005132256 is an apocalyptic number.

It is an amenable number.

321005132256 is an abundant number, since it is smaller than the sum of its proper divisors (523476817440).

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

321005132256 is a wasteful number, since it uses less digits than its factorization.

321005132256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4976 (or 4968 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 30.

Adding to 321005132256 its reverse (652231500123), we get a palindrome (973236632379).

The spelling of 321005132256 in words is "three hundred twenty-one billion, five million, one hundred thirty-two thousand, two hundred fifty-six".