15012131561 has 16 divisors (see below), whose sum is σ = 17769248640. Its totient is φ = 12409192320.

The previous prime is 15012131551. The next prime is 15012131567. The reversal of 15012131561 is 16513121051.

It is not a de Polignac number, because 15012131561 - 2¹⁰ = 15012130537 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 15012131561.

It is not an unprimeable number, because it can be changed into a prime (15012131567) 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, 130826 + ... + 217116.

It is an arithmetic number, because the mean of its divisors is an integer number (1110578040).

Almost surely, 2^15012131561 is an apocalyptic number.

It is an amenable number.

15012131561 is a deficient number, since it is larger than the sum of its proper divisors (2757117079).

15012131561 is an equidigital number, since it uses as much as digits as its factorization.

15012131561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87184.

The product of its (nonzero) digits is 900, while the sum is 26.

The spelling of 15012131561 in words is "fifteen billion, twelve million, one hundred thirty-one thousand, five hundred sixty-one".