231312210320 has 40 divisors (see below), whose sum is σ = 552336055224. Its totient is φ = 90024210432.

The previous prime is 231312210313. The next prime is 231312210361. The reversal of 231312210320 is 23012213132.

It can be written as a sum of positive squares in 4 ways, for example, as 67924869376 + 163387340944 = 260624^2 + 404212^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 231312210292 and 231312210301.

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, 39070049 + ... + 39075968.

Almost surely, 2^231312210320 is an apocalyptic number.

231312210320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231312210320 is an abundant number, since it is smaller than the sum of its proper divisors (321023844904).

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

231312210320 is a wasteful number, since it uses less digits than its factorization.

231312210320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78146067 (or 78146061 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 231312210320 its reverse (23012213132), we get a palindrome (254324423452).

The spelling of 231312210320 in words is "two hundred thirty-one billion, three hundred twelve million, two hundred ten thousand, three hundred twenty".