115931971 has 8 divisors (see below), whose sum is σ = 120369024. Its totient is φ = 111538560.

The previous prime is 115931953. The next prime is 115932007. The reversal of 115931971 is 179139511.

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 115931971 - 2¹³ = 115923779 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 115931971.

It is not an unprimeable number, because it can be changed into a prime (115931951) 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, 5446 + ... + 16171.

It is an arithmetic number, because the mean of its divisors is an integer number (15046128).

Almost surely, 2^115931971 is an apocalyptic number.

115931971 is a deficient number, since it is larger than the sum of its proper divisors (4437053).

115931971 is a wasteful number, since it uses less digits than its factorization.

115931971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21821.

The product of its digits is 8505, while the sum is 37.

The square root of 115931971 is about 10767.1709840608. The cubic root of 115931971 is about 487.6045391415.

The spelling of 115931971 in words is "one hundred fifteen million, nine hundred thirty-one thousand, nine hundred seventy-one".