2315431231 has 4 divisors (see below), whose sum is σ = 2319284464. Its totient is φ = 2311578000.

The previous prime is 2315431169. The next prime is 2315431247. The reversal of 2315431231 is 1321345132.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2315431231 - 2¹¹ = 2315429183 is a prime.

It is a super-2 number, since 2×2315431231² = 10722443570980350722, 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 = 2315431196 and 2315431205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2315441231) 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, 1925715 + ... + 1926916.

It is an arithmetic number, because the mean of its divisors is an integer number (579821116).

Almost surely, 2^2315431231 is an apocalyptic number.

2315431231 is a deficient number, since it is larger than the sum of its proper divisors (3853233).

2315431231 is an equidigital number, since it uses as much as digits as its factorization.

2315431231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3853232.

The product of its digits is 2160, while the sum is 25.

The square root of 2315431231 is about 48118.9279909684. The cubic root of 2315431231 is about 1322.9516195165.

Adding to 2315431231 its reverse (1321345132), we get a palindrome (3636776363).

The spelling of 2315431231 in words is "two billion, three hundred fifteen million, four hundred thirty-one thousand, two hundred thirty-one".