15113971 has 4 divisors (see below), whose sum is σ = 15370200. Its totient is φ = 14857744.

The previous prime is 15113963. The next prime is 15113981. The reversal of 15113971 is 17931151.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 17931151 = 7 ⋅2561593.

It is a cyclic number.

It is not a de Polignac number, because 15113971 - 2³ = 15113963 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15113981) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 128026 + ... + 128143.

It is an arithmetic number, because the mean of its divisors is an integer number (3842550).

Almost surely, 2^15113971 is an apocalyptic number.

15113971 is a deficient number, since it is larger than the sum of its proper divisors (256229).

15113971 is an equidigital number, since it uses as much as digits as its factorization.

15113971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 256228.

The product of its digits is 945, while the sum is 28.

The square root of 15113971 is about 3887.6690960008. The cubic root of 15113971 is about 247.2442469140.

The spelling of 15113971 in words is "fifteen million, one hundred thirteen thousand, nine hundred seventy-one".