31542412 has 24 divisors (see below), whose sum is σ = 63761040. Its totient is φ = 13493760.

The previous prime is 31542397. The next prime is 31542419. The reversal of 31542412 is 21424513.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is not an unprimeable number, because it can be changed into a prime (31542419) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20337 + ... + 21832.

It is an arithmetic number, because the mean of its divisors is an integer number (2656710).

Almost surely, 2^31542412 is an apocalyptic number.

It is an amenable number.

31542412 is an abundant number, since it is smaller than the sum of its proper divisors (32218628).

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

31542412 is a wasteful number, since it uses less digits than its factorization.

31542412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42201 (or 42199 counting only the distinct ones).

The product of its digits is 960, while the sum is 22.

The square root of 31542412 is about 5616.2631704720. The cubic root of 31542412 is about 315.9596567628.

Adding to 31542412 its reverse (21424513), we get a palindrome (52966925).

The spelling of 31542412 in words is "thirty-one million, five hundred forty-two thousand, four hundred twelve".