321255513243 has 48 divisors (see below), whose sum is σ = 557944261056. Its totient is φ = 174256634880.

The previous prime is 321255513223. The next prime is 321255513247. The reversal of 321255513243 is 342315552123.

321255513243 is a `hidden beast` number, since 32 + 1 + 2 + 5 + 551 + 32 + 43 = 666.

It is not a de Polignac number, because 321255513243 - 2⁵ = 321255513211 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 321255513198 and 321255513207.

It is not an unprimeable number, because it can be changed into a prime (321255513247) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1585146 + ... + 1776287.

It is an arithmetic number, because the mean of its divisors is an integer number (11623838772).

Almost surely, 2^321255513243 is an apocalyptic number.

321255513243 is a deficient number, since it is larger than the sum of its proper divisors (236688747813).

321255513243 is a wasteful number, since it uses less digits than its factorization.

321255513243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3361524 (or 3361521 counting only the distinct ones).

The product of its digits is 108000, while the sum is 36.

The spelling of 321255513243 in words is "three hundred twenty-one billion, two hundred fifty-five million, five hundred thirteen thousand, two hundred forty-three".