31343930 has 16 divisors (see below), whose sum is σ = 56968704. Its totient is φ = 12415440.

The previous prime is 31343909. The next prime is 31343941. The reversal of 31343930 is 3934313.

It is a self number, because there is not a number n which added to its sum of digits gives 31343930.

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, 14186 + ... + 16245.

It is an arithmetic number, because the mean of its divisors is an integer number (3560544).

Almost surely, 2^31343930 is an apocalyptic number.

31343930 is a deficient number, since it is larger than the sum of its proper divisors (25624774).

31343930 is a wasteful number, since it uses less digits than its factorization.

31343930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30541.

The product of its (nonzero) digits is 2916, while the sum is 26.

The square root of 31343930 is about 5598.5649947107. The cubic root of 31343930 is about 315.2955318343.

The spelling of 31343930 in words is "thirty-one million, three hundred forty-three thousand, nine hundred thirty".