138031315 has 8 divisors (see below), whose sum is σ = 165707568. Its totient is φ = 110378400.

The previous prime is 138031277. The next prime is 138031319. The reversal of 138031315 is 513130831.

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

It is a de Polignac number, because none of the positive numbers 2^k-138031315 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 138031315.

It is not an unprimeable number, because it can be changed into a prime (138031319) 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, 12324 + ... + 20686.

It is an arithmetic number, because the mean of its divisors is an integer number (20713446).

Almost surely, 2^138031315 is an apocalyptic number.

138031315 is a deficient number, since it is larger than the sum of its proper divisors (27676253).

138031315 is an equidigital number, since it uses as much as digits as its factorization.

138031315 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11669.

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 138031315 is about 11748.6729037794. The cubic root of 138031315 is about 516.8040104290.

The spelling of 138031315 in words is "one hundred thirty-eight million, thirty-one thousand, three hundred fifteen".