31311742 has 16 divisors (see below), whose sum is σ = 58557312. Its totient is φ = 12199320.

The previous prime is 31311703. The next prime is 31311743. The reversal of 31311742 is 24711313.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a pancake number, because a pancake can be divided into 31311742 parts by 7913 straight cuts.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31311743) 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, 101508 + ... + 101815.

It is an arithmetic number, because the mean of its divisors is an integer number (3659832).

Almost surely, 2^31311742 is an apocalyptic number.

31311742 is a deficient number, since it is larger than the sum of its proper divisors (27245570).

31311742 is a wasteful number, since it uses less digits than its factorization.

31311742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 203343.

The product of its digits is 504, while the sum is 22.

The square root of 31311742 is about 5595.6895911049. The cubic root of 31311742 is about 315.1875661285.

The spelling of 31311742 in words is "thirty-one million, three hundred eleven thousand, seven hundred forty-two".