31916542 has 48 divisors (see below), whose sum is σ = 59795280. Its totient is φ = 12700800.

The previous prime is 31916537. The next prime is 31916551. The reversal of 31916542 is 24561913.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 113442 + ... + 113722.

It is an arithmetic number, because the mean of its divisors is an integer number (1245735).

Almost surely, 2^31916542 is an apocalyptic number.

31916542 is a deficient number, since it is larger than the sum of its proper divisors (27878738).

31916542 is a wasteful number, since it uses less digits than its factorization.

31916542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 377 (or 370 counting only the distinct ones).

The product of its digits is 6480, while the sum is 31.

The square root of 31916542 is about 5649.4727187588. The cubic root of 31916542 is about 317.2039673575.

It can be divided in two parts, 319 and 16542, that added together give a palindrome (16861).

The spelling of 31916542 in words is "thirty-one million, nine hundred sixteen thousand, five hundred forty-two".