213113439 has 24 divisors (see below), whose sum is σ = 383789952. Its totient is φ = 110707920.

The previous prime is 213113413. The next prime is 213113441. The reversal of 213113439 is 934311312.

213113439 is a `hidden beast` number, since 2 + 1 + 311 + 343 + 9 = 666.

It is not a de Polignac number, because 213113439 - 2⁹ = 213112927 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213113339) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 153069 + ... + 154454.

It is an arithmetic number, because the mean of its divisors is an integer number (15991248).

Almost surely, 2^213113439 is an apocalyptic number.

213113439 is a deficient number, since it is larger than the sum of its proper divisors (170676513).

213113439 is a wasteful number, since it uses less digits than its factorization.

213113439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 307547 (or 307544 counting only the distinct ones).

The product of its digits is 1944, while the sum is 27.

The square root of 213113439 is about 14598.4053581205. The cubic root of 213113439 is about 597.3152632318.

The spelling of 213113439 in words is "two hundred thirteen million, one hundred thirteen thousand, four hundred thirty-nine".