115651971 has 36 divisors (see below), whose sum is σ = 177493680. Its totient is φ = 72465120.

The previous prime is 115651967. The next prime is 115652039. The reversal of 115651971 is 179156511.

115651971 is a `hidden beast` number, since 1 + 1 + 565 + 1 + 97 + 1 = 666.

It is not a de Polignac number, because 115651971 - 2² = 115651967 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (115651871) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1463910 + ... + 1463988.

It is an arithmetic number, because the mean of its divisors is an integer number (4930380).

Almost surely, 2^115651971 is an apocalyptic number.

115651971 is a deficient number, since it is larger than the sum of its proper divisors (61841709).

115651971 is an equidigital number, since it uses as much as digits as its factorization.

115651971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 264 (or 182 counting only the distinct ones).

The product of its digits is 9450, while the sum is 36.

The square root of 115651971 is about 10754.1606367024. The cubic root of 115651971 is about 487.2116669737.

The spelling of 115651971 in words is "one hundred fifteen million, six hundred fifty-one thousand, nine hundred seventy-one".