31457242 has 16 divisors (see below), whose sum is σ = 50122152. Its totient is φ = 14755840.

The previous prime is 31457227. The next prime is 31457267. The reversal of 31457242 is 24275413.

It can be written as a sum of positive squares in 4 ways, for example, as 31036041 + 421201 = 5571^2 + 649^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 31457242.

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, 10692 + ... + 13312.

Almost surely, 2^31457242 is an apocalyptic number.

31457242 is a deficient number, since it is larger than the sum of its proper divisors (18664910).

31457242 is a wasteful number, since it uses less digits than its factorization.

31457242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2993.

The product of its digits is 6720, while the sum is 28.

The square root of 31457242 is about 5608.6756012449. The cubic root of 31457242 is about 315.6750184037.

The spelling of 31457242 in words is "thirty-one million, four hundred fifty-seven thousand, two hundred forty-two".