31543542 has 12 divisors (see below), whose sum is σ = 68344380. Its totient is φ = 10514508.

The previous prime is 31543531. The next prime is 31543543. The reversal of 31543542 is 24534513.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31543543) 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 5 ways as a sum of consecutive naturals, for example, 876192 + ... + 876227.

It is an arithmetic number, because the mean of its divisors is an integer number (5695365).

Almost surely, 2^31543542 is an apocalyptic number.

31543542 is an abundant number, since it is smaller than the sum of its proper divisors (36800838).

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

31543542 is a wasteful number, since it uses less digits than its factorization.

31543542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1752427 (or 1752424 counting only the distinct ones).

The product of its digits is 7200, while the sum is 27.

The square root of 31543542 is about 5616.3637702699. The cubic root of 31543542 is about 315.9634297796.

The spelling of 31543542 in words is "thirty-one million, five hundred forty-three thousand, five hundred forty-two".