213513365631 has 16 divisors (see below), whose sum is σ = 302284570464. Its totient is φ = 133589643264.

The previous prime is 213513365587. The next prime is 213513365633. The reversal of 213513365631 is 136563315312.

It is not a de Polignac number, because 213513365631 - 2⁶ = 213513365567 is a prime.

It is a super-2 number, since 2×213513365631² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 213513365631.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213513365633) 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, 5911936 + ... + 5947941.

It is an arithmetic number, because the mean of its divisors is an integer number (18892785654).

Almost surely, 2^213513365631 is an apocalyptic number.

213513365631 is a deficient number, since it is larger than the sum of its proper divisors (88771204833).

213513365631 is a wasteful number, since it uses less digits than its factorization.

213513365631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11860250.

The product of its digits is 145800, while the sum is 39.

The spelling of 213513365631 in words is "two hundred thirteen billion, five hundred thirteen million, three hundred sixty-five thousand, six hundred thirty-one".