138714231 has 16 divisors (see below), whose sum is σ = 195555200. Its totient is φ = 87218208.

The previous prime is 138714229. The next prime is 138714239. The reversal of 138714231 is 132417831.

It is not a de Polignac number, because 138714231 - 2¹ = 138714229 is a prime.

It is a super-2 number, since 2×138714231² = 38483275763842722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138714239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7740 + ... + 18366.

It is an arithmetic number, because the mean of its divisors is an integer number (12222200).

Almost surely, 2^138714231 is an apocalyptic number.

138714231 is a deficient number, since it is larger than the sum of its proper divisors (56840969).

138714231 is a wasteful number, since it uses less digits than its factorization.

138714231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10878.

The product of its digits is 4032, while the sum is 30.

The square root of 138714231 is about 11777.7005820321. The cubic root of 138714231 is about 517.6549121983.

The spelling of 138714231 in words is "one hundred thirty-eight million, seven hundred fourteen thousand, two hundred thirty-one".