321255250250440 has 64 divisors (see below), whose sum is σ = 788538150653760. Its totient is φ = 116819715237120.

The previous prime is 321255250250419. The next prime is 321255250250443. The reversal of 321255250250440 is 44052052552123.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 321255250250393 and 321255250250402.

It is not an unprimeable number, because it can be changed into a prime (321255250250443) 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, 161283462 + ... + 163263178.

It is an arithmetic number, because the mean of its divisors is an integer number (12320908603965).

Almost surely, 2^{321255250250440} is an apocalyptic number.

It is an amenable number.

321255250250440 is an abundant number, since it is smaller than the sum of its proper divisors (467282900403320).

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

321255250250440 is a wasteful number, since it uses less digits than its factorization.

321255250250440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2348542 (or 2348538 counting only the distinct ones).

The product of its (nonzero) digits is 480000, while the sum is 40.

The spelling of 321255250250440 in words is "three hundred twenty-one trillion, two hundred fifty-five billion, two hundred fifty million, two hundred fifty thousand, four hundred forty".