2131313031 has 6 divisors (see below), whose sum is σ = 3078563280. Its totient is φ = 1420875348.

The previous prime is 2131312969. The next prime is 2131313053. The reversal of 2131313031 is 1303131312.

It is a happy number.

It is not a de Polignac number, because 2131313031 - 2¹¹ = 2131310983 is a prime.

It is a super-2 number, since 2×2131313031² = 9084990472220813922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2131312995 and 2131313013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2131313071) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 118406271 + ... + 118406288.

It is an arithmetic number, because the mean of its divisors is an integer number (513093880).

Almost surely, 2^2131313031 is an apocalyptic number.

2131313031 is a deficient number, since it is larger than the sum of its proper divisors (947250249).

2131313031 is a wasteful number, since it uses less digits than its factorization.

2131313031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 236812565 (or 236812562 counting only the distinct ones).

The product of its (nonzero) digits is 162, while the sum is 18.

The square root of 2131313031 is about 46166.1459405049. The cubic root of 2131313031 is about 1286.9126801982.

Adding to 2131313031 its reverse (1303131312), we get a palindrome (3434444343).

The spelling of 2131313031 in words is "two billion, one hundred thirty-one million, three hundred thirteen thousand, thirty-one".