31343013 has 24 divisors (see below), whose sum is σ = 49387520. Its totient is φ = 19038240.

The previous prime is 31342991. The next prime is 31343023. The reversal of 31343013 is 31034313.

It is not a de Polignac number, because 31343013 - 2⁹ = 31342501 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31343023) 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, 7548 + ... + 10938.

Almost surely, 2^31343013 is an apocalyptic number.

It is an amenable number.

31343013 is a deficient number, since it is larger than the sum of its proper divisors (18044507).

31343013 is a wasteful number, since it uses less digits than its factorization.

31343013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3489 (or 3486 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 18.

The square root of 31343013 is about 5598.4830981258. The cubic root of 31343013 is about 315.2924570356.

Adding to 31343013 its reverse (31034313), we get a palindrome (62377326).

The spelling of 31343013 in words is "thirty-one million, three hundred forty-three thousand, thirteen".