31357434 has 16 divisors (see below), whose sum is σ = 63599040. Its totient is φ = 10305120.

The previous prime is 31357421. The next prime is 31357457. The reversal of 31357434 is 43475313.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36379 + ... + 37230.

It is an arithmetic number, because the mean of its divisors is an integer number (3974940).

Almost surely, 2^31357434 is an apocalyptic number.

31357434 is an abundant number, since it is smaller than the sum of its proper divisors (32241606).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31357434 is a wasteful number, since it uses less digits than its factorization.

31357434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73685.

The product of its digits is 15120, while the sum is 30.

The square root of 31357434 is about 5599.7708881703. The cubic root of 31357434 is about 315.3408052418.

The spelling of 31357434 in words is "thirty-one million, three hundred fifty-seven thousand, four hundred thirty-four".