2115318231 has 24 divisors (see below), whose sum is σ = 3379434240. Its totient is φ = 1266549696.

The previous prime is 2115318217. The next prime is 2115318251. The reversal of 2115318231 is 1328135112.

2115318231 is a `hidden beast` number, since 2 + 115 + 318 + 231 = 666.

It is not a de Polignac number, because 2115318231 - 2⁵ = 2115318199 is a prime.

It is a super-2 number, since 2×2115318231² = 8949142436801938722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2115318195 and 2115318204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2115318251) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 239991 + ... + 248648.

It is an arithmetic number, because the mean of its divisors is an integer number (140809760).

Almost surely, 2^2115318231 is an apocalyptic number.

2115318231 is a deficient number, since it is larger than the sum of its proper divisors (1264116009).

2115318231 is a wasteful number, since it uses less digits than its factorization.

2115318231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 488695 (or 488692 counting only the distinct ones).

The product of its digits is 1440, while the sum is 27.

The square root of 2115318231 is about 45992.5888703821. The cubic root of 2115318231 is about 1283.6853084299.

The spelling of 2115318231 in words is "two billion, one hundred fifteen million, three hundred eighteen thousand, two hundred thirty-one".