31042543 has 8 divisors (see below), whose sum is σ = 35536160. Its totient is φ = 26563680.

The previous prime is 31042541. The next prime is 31042567. The reversal of 31042543 is 34524013.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 31042543 - 2¹ = 31042541 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 (31042541) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1273 + ... + 7981.

It is an arithmetic number, because the mean of its divisors is an integer number (4442020).

Almost surely, 2^31042543 is an apocalyptic number.

31042543 is a deficient number, since it is larger than the sum of its proper divisors (4493617).

31042543 is an equidigital number, since it uses as much as digits as its factorization.

31042543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7377.

The product of its (nonzero) digits is 1440, while the sum is 22.

The square root of 31042543 is about 5571.5835271492. The cubic root of 31042543 is about 314.2817025167.

Adding to 31042543 its reverse (34524013), we get a palindrome (65566556).

The spelling of 31042543 in words is "thirty-one million, forty-two thousand, five hundred forty-three".