31143542 has 16 divisors (see below), whose sum is σ = 47841840. Its totient is φ = 15199392.

The previous prime is 31143521. The next prime is 31143551. The reversal of 31143542 is 24534113.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23633 + ... + 24915.

It is an arithmetic number, because the mean of its divisors is an integer number (2990115).

Almost surely, 2^31143542 is an apocalyptic number.

31143542 is a deficient number, since it is larger than the sum of its proper divisors (16698298).

31143542 is a wasteful number, since it uses less digits than its factorization.

31143542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1567.

The product of its digits is 1440, while the sum is 23.

The square root of 31143542 is about 5580.6399274635. The cubic root of 31143542 is about 314.6221790760.

Adding to 31143542 its reverse (24534113), we get a palindrome (55677655).

The spelling of 31143542 in words is "thirty-one million, one hundred forty-three thousand, five hundred forty-two".