31132013 has 8 divisors (see below), whose sum is σ = 35749920. Its totient is φ = 26812080.

The previous prime is 31131979. The next prime is 31132027. The reversal of 31132013 is 31023113.

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

It is a cyclic number.

It is not a de Polignac number, because 31132013 - 2¹⁰ = 31130989 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 (31132063) 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, 74270 + ... + 74687.

It is an arithmetic number, because the mean of its divisors is an integer number (4468740).

Almost surely, 2^31132013 is an apocalyptic number.

It is an amenable number.

31132013 is a deficient number, since it is larger than the sum of its proper divisors (4617907).

31132013 is a wasteful number, since it uses less digits than its factorization.

31132013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148987.

The product of its (nonzero) digits is 54, while the sum is 14.

The square root of 31132013 is about 5579.6068857940. The cubic root of 31132013 is about 314.5833510499.

Adding to 31132013 its reverse (31023113), we get a palindrome (62155126).

Subtracting from 31132013 its reverse (31023113), we obtain a square (108900 = 330²).

The spelling of 31132013 in words is "thirty-one million, one hundred thirty-two thousand, thirteen".