213131272356 has 120 divisors (see below), whose sum is σ = 604331254296. Its totient is φ = 65233797120.

The previous prime is 213131272303. The next prime is 213131272489. The reversal of 213131272356 is 653272131312.

213131272356 is a `hidden beast` number, since 2 + 1 + 3 + 1 + 31 + 272 + 356 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 213627456 + 212917644900 = 14616^2 + 461430^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 213131272356.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 246061 + ... + 697716.

Almost surely, 2^213131272356 is an apocalyptic number.

It is an amenable number.

213131272356 is an abundant number, since it is smaller than the sum of its proper divisors (391199981940).

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

213131272356 is a wasteful number, since it uses less digits than its factorization.

213131272356 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 943851 (or 943840 counting only the distinct ones).

The product of its digits is 45360, while the sum is 36.

The spelling of 213131272356 in words is "two hundred thirteen billion, one hundred thirty-one million, two hundred seventy-two thousand, three hundred fifty-six".