213915939 has 8 divisors (see below), whose sum is σ = 297622272. Its totient is φ = 136410120.

The previous prime is 213915931. The next prime is 213915953. The reversal of 213915939 is 939519312.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 213915939 - 2³ = 213915931 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 213915939.

It is not an unprimeable number, because it can be changed into a prime (213915931) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1550047 + ... + 1550184.

It is an arithmetic number, because the mean of its divisors is an integer number (37202784).

Almost surely, 2^213915939 is an apocalyptic number.

213915939 is a deficient number, since it is larger than the sum of its proper divisors (83706333).

213915939 is a wasteful number, since it uses less digits than its factorization.

213915939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3100257.

The product of its digits is 65610, while the sum is 42.

The square root of 213915939 is about 14625.8654102928. The cubic root of 213915939 is about 598.0640742595.

The spelling of 213915939 in words is "two hundred thirteen million, nine hundred fifteen thousand, nine hundred thirty-nine".