31431842 has 16 divisors (see below), whose sum is σ = 51492672. Its totient is φ = 14301840.

The previous prime is 31431821. The next prime is 31431857. The reversal of 31431842 is 24813413.

It is a Harshad number since it is a multiple of its sum of digits (26).

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, 6668 + ... + 10359.

It is an arithmetic number, because the mean of its divisors is an integer number (3218292).

Almost surely, 2^31431842 is an apocalyptic number.

31431842 is a deficient number, since it is larger than the sum of its proper divisors (20060830).

31431842 is a wasteful number, since it uses less digits than its factorization.

31431842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17113.

The product of its digits is 2304, while the sum is 26.

The square root of 31431842 is about 5606.4107947955. The cubic root of 31431842 is about 315.5900320964.

The spelling of 31431842 in words is "thirty-one million, four hundred thirty-one thousand, eight hundred forty-two".