31430244 has 48 divisors (see below), whose sum is σ = 75479040. Its totient is φ = 10175520.

The previous prime is 31430227. The next prime is 31430251. The reversal of 31430244 is 44203413.

It is a self number, because there is not a number n which added to its sum of digits gives 31430244.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 72709 + ... + 73139.

It is an arithmetic number, because the mean of its divisors is an integer number (1572480).

Almost surely, 2^31430244 is an apocalyptic number.

It is an amenable number.

31430244 is an abundant number, since it is smaller than the sum of its proper divisors (44048796).

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

31430244 is a wasteful number, since it uses less digits than its factorization.

31430244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 600 (or 598 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 21.

The square root of 31430244 is about 5606.2682775622. The cubic root of 31430244 is about 315.5846837894.

Adding to 31430244 its reverse (44203413), we get a palindrome (75633657).

The spelling of 31430244 in words is "thirty-one million, four hundred thirty thousand, two hundred forty-four".