213131308 has 36 divisors (see below), whose sum is σ = 407931888. Its totient is φ = 97381440.

The previous prime is 213131299. The next prime is 213131309. The reversal of 213131308 is 803131312.

It is not an unprimeable number, because it can be changed into a prime (213131309) 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, 68098 + ... + 71158.

Almost surely, 2^213131308 is an apocalyptic number.

It is an amenable number.

213131308 is a deficient number, since it is larger than the sum of its proper divisors (194800580).

213131308 is a wasteful number, since it uses less digits than its factorization.

213131308 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3194 (or 3179 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 213131308 is about 14599.0173641927. The cubic root of 213131308 is about 597.3319572019.

The spelling of 213131308 in words is "two hundred thirteen million, one hundred thirty-one thousand, three hundred eight".