15139564 has 24 divisors (see below), whose sum is σ = 29077776. Its totient is φ = 6840000.

The previous prime is 15139559. The next prime is 15139591. The reversal of 15139564 is 46593151.

15139564 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×15139564² = 458412796220192, which contains 22 as substring.

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, 7014 + ... + 8914.

It is an arithmetic number, because the mean of its divisors is an integer number (1211574).

Almost surely, 2^15139564 is an apocalyptic number.

It is an amenable number.

15139564 is a deficient number, since it is larger than the sum of its proper divisors (13938212).

15139564 is a wasteful number, since it uses less digits than its factorization.

15139564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2097 (or 2095 counting only the distinct ones).

The product of its digits is 16200, while the sum is 34.

The square root of 15139564 is about 3890.9592647572. The cubic root of 15139564 is about 247.3837239078.

The spelling of 15139564 in words is "fifteen million, one hundred thirty-nine thousand, five hundred sixty-four".