31312449 has 24 divisors (see below), whose sum is σ = 53361152. Its totient is φ = 17314560.

The previous prime is 31312447. The next prime is 31312493. The reversal of 31312449 is 94421313.

It is not a de Polignac number, because 31312449 - 2¹ = 31312447 is a prime.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31312441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6064 + ... + 9969.

Almost surely, 2^31312449 is an apocalyptic number.

It is an amenable number.

31312449 is a deficient number, since it is larger than the sum of its proper divisors (22048703).

31312449 is a wasteful number, since it uses less digits than its factorization.

31312449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16077 (or 16074 counting only the distinct ones).

The product of its digits is 2592, while the sum is 27.

The square root of 31312449 is about 5595.7527643741. The cubic root of 31312449 is about 315.1899383582.

It can be divided in two parts, 3131244 and 9, that added together give a triangular number (3131253 = T₂₅₀₂).

The spelling of 31312449 in words is "thirty-one million, three hundred twelve thousand, four hundred forty-nine".