2131512113 has 8 divisors (see below), whose sum is σ = 2152329960. Its totient is φ = 2110717440.

The previous prime is 2131512109. The next prime is 2131512133. The reversal of 2131512113 is 3112151312.

It can be written as a sum of positive squares in 4 ways, for example, as 12475024 + 2119037089 = 3532^2 + 46033^2 .

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 2131512113 - 2² = 2131512109 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2131512133) 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, 222131 + ... + 231527.

It is an arithmetic number, because the mean of its divisors is an integer number (269041245).

Almost surely, 2^2131512113 is an apocalyptic number.

It is an amenable number.

2131512113 is a deficient number, since it is larger than the sum of its proper divisors (20817847).

2131512113 is a wasteful number, since it uses less digits than its factorization.

2131512113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11587.

The product of its digits is 180, while the sum is 20.

The square root of 2131512113 is about 46168.3020372203. The cubic root of 2131512113 is about 1286.9527483267.

Adding to 2131512113 its reverse (3112151312), we get a palindrome (5243663425).

The spelling of 2131512113 in words is "two billion, one hundred thirty-one million, five hundred twelve thousand, one hundred thirteen".