31342743 has 12 divisors (see below), whose sum is σ = 46326280. Its totient is φ = 20408976.

The previous prime is 31342739. The next prime is 31342771. The reversal of 31342743 is 34724313.

It is not a de Polignac number, because 31342743 - 2² = 31342739 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 (31342733) 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 11 ways as a sum of consecutive naturals, for example, 40108 + ... + 40881.

Almost surely, 2^31342743 is an apocalyptic number.

31342743 is a deficient number, since it is larger than the sum of its proper divisors (14983537).

31342743 is a wasteful number, since it uses less digits than its factorization.

31342743 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81038 (or 81035 counting only the distinct ones).

The product of its digits is 6048, while the sum is 27.

The square root of 31342743 is about 5598.4589843992. The cubic root of 31342743 is about 315.2915516854.

The spelling of 31342743 in words is "thirty-one million, three hundred forty-two thousand, seven hundred forty-three".