2115311131 has 8 divisors (see below), whose sum is σ = 2132172000. Its totient is φ = 2098486080.

The previous prime is 2115311117. The next prime is 2115311153. The reversal of 2115311131 is 1311135112.

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 2115311131 - 2²⁷ = 1981093403 is a prime.

It is a super-2 number, since 2×2115311131² = 8949082361864998322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2115311099 and 2115311108.

It is not an unprimeable number, because it can be changed into a prime (2115311161) 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, 116551 + ... + 133471.

It is an arithmetic number, because the mean of its divisors is an integer number (266521500).

Almost surely, 2^2115311131 is an apocalyptic number.

2115311131 is a deficient number, since it is larger than the sum of its proper divisors (16860869).

2115311131 is a wasteful number, since it uses less digits than its factorization.

2115311131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17909.

The product of its digits is 90, while the sum is 19.

The square root of 2115311131 is about 45992.5116839687. The cubic root of 2115311131 is about 1283.6838722117.

Adding to 2115311131 its reverse (1311135112), we get a palindrome (3426446243).

The spelling of 2115311131 in words is "two billion, one hundred fifteen million, three hundred eleven thousand, one hundred thirty-one".