31320711 has 12 divisors (see below), whose sum is σ = 45433440. Its totient is φ = 20791680.

The previous prime is 31320701. The next prime is 31320713. The reversal of 31320711 is 11702313.

It is a de Polignac number, because none of the positive numbers 2^k-31320711 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31320713) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5130 + ... + 9431.

It is an arithmetic number, because the mean of its divisors is an integer number (3786120).

Almost surely, 2^31320711 is an apocalyptic number.

31320711 is a deficient number, since it is larger than the sum of its proper divisors (14112729).

31320711 is a wasteful number, since it uses less digits than its factorization.

31320711 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14806 (or 14803 counting only the distinct ones).

The product of its (nonzero) digits is 126, while the sum is 18.

The square root of 31320711 is about 5596.4909541605. The cubic root of 31320711 is about 315.2176575812.

The spelling of 31320711 in words is "thirty-one million, three hundred twenty thousand, seven hundred eleven".