31254040 has 16 divisors (see below), whose sum is σ = 70321680. Its totient is φ = 12501600.

The previous prime is 31254037. The next prime is 31254049. The reversal of 31254040 is 4045213.

It is a junction number, because it is equal to n+sod(n) for n = 31253999 and 31254017.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31254049) 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 3 ways as a sum of consecutive naturals, for example, 390636 + ... + 390715.

It is an arithmetic number, because the mean of its divisors is an integer number (4395105).

Almost surely, 2^31254040 is an apocalyptic number.

It is an amenable number.

31254040 is an abundant number, since it is smaller than the sum of its proper divisors (39067640).

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

31254040 is a wasteful number, since it uses less digits than its factorization.

31254040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 781362 (or 781358 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 31254040 is about 5590.5312806566. The cubic root of 31254040 is about 314.9938354383.

Adding to 31254040 its reverse (4045213), we get a palindrome (35299253).

The spelling of 31254040 in words is "thirty-one million, two hundred fifty-four thousand, forty".