115216631 has 4 divisors (see below), whose sum is σ = 118330632. Its totient is φ = 112102632.

The previous prime is 115216613. The next prime is 115216639. The reversal of 115216631 is 136612511.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 136612511 = 7 ⋅19516073.

It is a cyclic number.

It is not a de Polignac number, because 115216631 - 2⁶ = 115216567 is a prime.

It is a super-2 number, since 2×115216631² = 26549744117980322, which contains 22 as substring.

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 115216631.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (115216639) 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, 1556945 + ... + 1557018.

It is an arithmetic number, because the mean of its divisors is an integer number (29582658).

Almost surely, 2^115216631 is an apocalyptic number.

115216631 is a deficient number, since it is larger than the sum of its proper divisors (3114001).

115216631 is an equidigital number, since it uses as much as digits as its factorization.

115216631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3114000.

The product of its digits is 1080, while the sum is 26.

The square root of 115216631 is about 10733.9010150085. The cubic root of 115216631 is about 486.5995735889.

The spelling of 115216631 in words is "one hundred fifteen million, two hundred sixteen thousand, six hundred thirty-one".