31310013 has 8 divisors (see below), whose sum is σ = 47710528. Its totient is φ = 17891424.

The previous prime is 31310011. The next prime is 31310017. The reversal of 31310013 is 31001313.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 31310013 - 2¹ = 31310011 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31310011) 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, 745456 + ... + 745497.

It is an arithmetic number, because the mean of its divisors is an integer number (5963816).

Almost surely, 2^31310013 is an apocalyptic number.

It is an amenable number.

31310013 is a deficient number, since it is larger than the sum of its proper divisors (16400515).

31310013 is a wasteful number, since it uses less digits than its factorization.

31310013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1490963.

The product of its (nonzero) digits is 27, while the sum is 12.

The square root of 31310013 is about 5595.5350950557. The cubic root of 31310013 is about 315.1817645847.

Adding to 31310013 its reverse (31001313), we get a palindrome (62311326).

The spelling of 31310013 in words is "thirty-one million, three hundred ten thousand, thirteen".