321157315040 has 24 divisors (see below), whose sum is σ = 758734157160. Its totient is φ = 128462925952.

The previous prime is 321157315019. The next prime is 321157315049. The reversal of 321157315040 is 40513751123.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a junction number, because it is equal to n+sod(n) for n = 321157314988 and 321157315006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321157315049) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1003616450 + ... + 1003616769.

It is an arithmetic number, because the mean of its divisors is an integer number (31613923215).

Almost surely, 2^321157315040 is an apocalyptic number.

It is an amenable number.

321157315040 is an abundant number, since it is smaller than the sum of its proper divisors (437576842120).

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

321157315040 is a wasteful number, since it uses less digits than its factorization.

321157315040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2007233234 (or 2007233226 counting only the distinct ones).

The product of its (nonzero) digits is 12600, while the sum is 32.

The spelling of 321157315040 in words is "three hundred twenty-one billion, one hundred fifty-seven million, three hundred fifteen thousand, forty".