31743543 has 16 divisors (see below), whose sum is σ = 46161920. Its totient is φ = 19285344.

The previous prime is 31743533. The next prime is 31743557. The reversal of 31743543 is 34534713.

It is not a de Polignac number, because 31743543 - 2⁵ = 31743511 is a prime.

It is a Smith number, since the sum of its digits (30) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 31743543.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31743533) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2071 + ... + 8232.

It is an arithmetic number, because the mean of its divisors is an integer number (2885120).

Almost surely, 2^31743543 is an apocalyptic number.

31743543 is a deficient number, since it is larger than the sum of its proper divisors (14418377).

31743543 is a wasteful number, since it uses less digits than its factorization.

31743543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10398.

The product of its digits is 15120, while the sum is 30.

The square root of 31743543 is about 5634.1408395602. The cubic root of 31743543 is about 316.6298093145.

The spelling of 31743543 in words is "thirty-one million, seven hundred forty-three thousand, five hundred forty-three".