139215238 has 16 divisors (see below), whose sum is σ = 217495584. Its totient is φ = 66769920.

The previous prime is 139215229. The next prime is 139215253. The reversal of 139215238 is 832512931.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7995 + ... + 18502.

It is an arithmetic number, because the mean of its divisors is an integer number (13593474).

Almost surely, 2^139215238 is an apocalyptic number.

139215238 is a deficient number, since it is larger than the sum of its proper divisors (78280346).

139215238 is a wasteful number, since it uses less digits than its factorization.

139215238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26607.

The product of its digits is 12960, while the sum is 34.

The square root of 139215238 is about 11798.9507160595. The cubic root of 139215238 is about 518.2773840716.

The spelling of 139215238 in words is "one hundred thirty-nine million, two hundred fifteen thousand, two hundred thirty-eight".