31318742 has 72 divisors (see below), whose sum is σ = 62085312. Its totient is φ = 11793600.

The previous prime is 31318723. The next prime is 31318747. The reversal of 31318742 is 24781313.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31318747) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 513392 + ... + 513452.

It is an arithmetic number, because the mean of its divisors is an integer number (862296).

Almost surely, 2^31318742 is an apocalyptic number.

31318742 is a deficient number, since it is larger than the sum of its proper divisors (30766570).

31318742 is a wasteful number, since it uses less digits than its factorization.

31318742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134 (or 114 counting only the distinct ones).

The product of its digits is 4032, while the sum is 29.

The square root of 31318742 is about 5596.3150375939. The cubic root of 31318742 is about 315.2110519779.

The spelling of 31318742 in words is "thirty-one million, three hundred eighteen thousand, seven hundred forty-two".