15131481 has 16 divisors (see below), whose sum is σ = 20745984. Its totient is φ = 9806544.

The previous prime is 15131471. The next prime is 15131497. The reversal of 15131481 is 18413151.

It is not a de Polignac number, because 15131481 - 2¹⁰ = 15130457 is a prime.

It is a super-2 number, since 2×15131481² = 457923434506722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (15131461) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16230 + ... + 17136.

It is an arithmetic number, because the mean of its divisors is an integer number (1296624).

Almost surely, 2^15131481 is an apocalyptic number.

It is an amenable number.

15131481 is a deficient number, since it is larger than the sum of its proper divisors (5614503).

15131481 is an equidigital number, since it uses as much as digits as its factorization.

15131481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1060.

The product of its digits is 480, while the sum is 24.

The square root of 15131481 is about 3889.9204362043. The cubic root of 15131481 is about 247.3396900856.

The spelling of 15131481 in words is "fifteen million, one hundred thirty-one thousand, four hundred eighty-one".