15139631 has 4 divisors (see below), whose sum is σ = 16304232. Its totient is φ = 13975032.

The previous prime is 15139601. The next prime is 15139669. The reversal of 15139631 is 13693151.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13693151 = 571 ⋅23981.

It is a cyclic number.

It is not a de Polignac number, because 15139631 - 2¹⁴ = 15123247 is a prime.

It is a super-2 number, since 2×15139631² = 458416853632322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 15139594 and 15139603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15139601) 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 3 ways as a sum of consecutive naturals, for example, 582281 + ... + 582306.

It is an arithmetic number, because the mean of its divisors is an integer number (4076058).

Almost surely, 2^15139631 is an apocalyptic number.

15139631 is a deficient number, since it is larger than the sum of its proper divisors (1164601).

15139631 is a wasteful number, since it uses less digits than its factorization.

15139631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1164600.

The product of its digits is 2430, while the sum is 29.

The square root of 15139631 is about 3890.9678744497. The cubic root of 15139631 is about 247.3840888387.

The spelling of 15139631 in words is "fifteen million, one hundred thirty-nine thousand, six hundred thirty-one".