312212202320 has 80 divisors (see below), whose sum is σ = 729255681792. Its totient is φ = 124307220480.

The previous prime is 312212202311. The next prime is 312212202331. The reversal of 312212202320 is 23202212213.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×312212202320² (a number of 24 digits) contains 22 as substring.

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 = 312212202292 and 312212202301.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28629989 + ... + 28640891.

Almost surely, 2^312212202320 is an apocalyptic number.

It is an amenable number.

312212202320 is an abundant number, since it is smaller than the sum of its proper divisors (417043479472).

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

312212202320 is a wasteful number, since it uses less digits than its factorization.

312212202320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12540 (or 12534 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 312212202320 its reverse (23202212213), we get a palindrome (335414414533).

The spelling of 312212202320 in words is "three hundred twelve billion, two hundred twelve million, two hundred two thousand, three hundred twenty".