15125531161 has 8 divisors (see below), whose sum is σ = 16512172040. Its totient is φ = 13770767232.

The previous prime is 15125531149. The next prime is 15125531173. The reversal of 15125531161 is 16113552151.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (15125531149) and next prime (15125531173).

It can be written as a sum of positive squares in 4 ways, for example, as 1556775936 + 13568755225 = 39456^2 + 116485^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 15125531161 - 2²³ = 15117142553 is a prime.

It is a super-3 number, since 3×15125531161³ (a number of 32 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (15125231161) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7968246 + ... + 7970143.

It is an arithmetic number, because the mean of its divisors is an integer number (2064021505).

Almost surely, 2^15125531161 is an apocalyptic number.

It is an amenable number.

15125531161 is a deficient number, since it is larger than the sum of its proper divisors (1386640879).

15125531161 is a wasteful number, since it uses less digits than its factorization.

15125531161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15938475.

The product of its digits is 4500, while the sum is 31.

The spelling of 15125531161 in words is "fifteen billion, one hundred twenty-five million, five hundred thirty-one thousand, one hundred sixty-one".