31042424 has 32 divisors (see below), whose sum is σ = 66718080. Its totient is φ = 13264224.

The previous prime is 31042421. The next prime is 31042457. The reversal of 31042424 is 42424013.

It is a junction number, because it is equal to n+sod(n) for n = 31042396 and 31042405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31042421) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25559 + ... + 26745.

It is an arithmetic number, because the mean of its divisors is an integer number (2084940).

Almost surely, 2^31042424 is an apocalyptic number.

It is an amenable number.

31042424 is an abundant number, since it is smaller than the sum of its proper divisors (35675656).

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

31042424 is a wasteful number, since it uses less digits than its factorization.

31042424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1667 (or 1663 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 31042424 is about 5571.5728479488. The cubic root of 31042424 is about 314.2813009219.

Adding to 31042424 its reverse (42424013), we get a palindrome (73466437).

The spelling of 31042424 in words is "thirty-one million, forty-two thousand, four hundred twenty-four".