213013239 has 4 divisors (see below), whose sum is σ = 284017656. Its totient is φ = 142008824.

The previous prime is 213013219. The next prime is 213013243. The reversal of 213013239 is 932310312.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 213013239 - 2¹⁶ = 212947703 is a prime.

It is a super-2 number, since 2×213013239² = 90749279978542242, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213013219) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35502204 + ... + 35502209.

It is an arithmetic number, because the mean of its divisors is an integer number (71004414).

Almost surely, 2^213013239 is an apocalyptic number.

213013239 is a deficient number, since it is larger than the sum of its proper divisors (71004417).

213013239 is an equidigital number, since it uses as much as digits as its factorization.

213013239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71004416.

The product of its (nonzero) digits is 972, while the sum is 24.

The square root of 213013239 is about 14594.9730729454. The cubic root of 213013239 is about 597.2216348928.

The spelling of 213013239 in words is "two hundred thirteen million, thirteen thousand, two hundred thirty-nine".