15131385 has 12 divisors (see below), whose sum is σ = 26227812. Its totient is φ = 8070048.

The previous prime is 15131383. The next prime is 15131387. The reversal of 15131385 is 58313151.

It is an interprime number because it is at equal distance from previous prime (15131383) and next prime (15131387).

It can be written as a sum of positive squares in 2 ways, for example, as 2663424 + 12467961 = 1632^2 + 3531^2 .

It is not a de Polignac number, because 15131385 - 2¹ = 15131383 is a prime.

It is not an unprimeable number, because it can be changed into a prime (15131381) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 168082 + ... + 168171.

It is an arithmetic number, because the mean of its divisors is an integer number (2185651).

Almost surely, 2^15131385 is an apocalyptic number.

15131385 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

15131385 is a deficient number, since it is larger than the sum of its proper divisors (11096427).

15131385 is a wasteful number, since it uses less digits than its factorization.

15131385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 336264 (or 336261 counting only the distinct ones).

The product of its digits is 1800, while the sum is 27.

The square root of 15131385 is about 3889.9080966007. The cubic root of 15131385 is about 247.3391670114.

The spelling of 15131385 in words is "fifteen million, one hundred thirty-one thousand, three hundred eighty-five".