2315131 has 24 divisors (see below), whose sum is σ = 3045120. Its totient is φ = 1718496.

The previous prime is 2315129. The next prime is 2315141. The reversal of 2315131 is 1315132.

It is not a de Polignac number, because 2315131 - 2¹ = 2315129 is a prime.

It is a super-2 number, since 2×2315131² = 10719663094322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2315141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 22426 + ... + 22528.

It is an arithmetic number, because the mean of its divisors is an integer number (126880).

2^2315131 is an apocalyptic number.

2315131 is a deficient number, since it is larger than the sum of its proper divisors (729989).

2315131 is a wasteful number, since it uses less digits than its factorization.

2315131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155 (or 142 counting only the distinct ones).

The product of its digits is 90, while the sum is 16.

The square root of 2315131 is about 1521.5554541324. Note that the first 3 decimals coincide. The cubic root of 2315131 is about 132.2894436755.

Subtracting from 2315131 its reverse (1315132), we obtain a palindrome (999999).

The spelling of 2315131 in words is "two million, three hundred fifteen thousand, one hundred thirty-one".