31542543 has 6 divisors (see below), whose sum is σ = 45561464. Its totient is φ = 21028356.

The previous prime is 31542523. The next prime is 31542547. The reversal of 31542543 is 34524513.

It is not a de Polignac number, because 31542543 - 2⁶ = 31542479 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31542547) 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, 1752355 + ... + 1752372.

Almost surely, 2^31542543 is an apocalyptic number.

31542543 is a deficient number, since it is larger than the sum of its proper divisors (14018921).

31542543 is a wasteful number, since it uses less digits than its factorization.

31542543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3504733 (or 3504730 counting only the distinct ones).

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

The square root of 31542543 is about 5616.2748330188. The cubic root of 31542543 is about 315.9600941703.

The spelling of 31542543 in words is "thirty-one million, five hundred forty-two thousand, five hundred forty-three".