213256215 has 12 divisors (see below), whose sum is σ = 369644184. Its totient is φ = 113736624.

The previous prime is 213256201. The next prime is 213256217. The reversal of 213256215 is 512652312.

It is a happy number.

213256215 is a `hidden beast` number, since 2 + 1 + 32 + 5 + 621 + 5 = 666.

It is not a de Polignac number, because 213256215 - 2⁶ = 213256151 is a prime.

It is a super-2 number, since 2×213256215² = 90956426472252450, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213256217) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2369469 + ... + 2369558.

It is an arithmetic number, because the mean of its divisors is an integer number (30803682).

Almost surely, 2^213256215 is an apocalyptic number.

213256215 is a deficient number, since it is larger than the sum of its proper divisors (156387969).

213256215 is a wasteful number, since it uses less digits than its factorization.

213256215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4739038 (or 4739035 counting only the distinct ones).

The product of its digits is 3600, while the sum is 27.

The square root of 213256215 is about 14603.2946625068. The cubic root of 213256215 is about 597.4486245166.

The spelling of 213256215 in words is "two hundred thirteen million, two hundred fifty-six thousand, two hundred fifteen".