31743842 has 8 divisors (see below), whose sum is σ = 51278556. Its totient is φ = 14650992.

The previous prime is 31743839. The next prime is 31743917. The reversal of 31743842 is 24834713.

It can be written as a sum of positive squares in 2 ways, for example, as 30349081 + 1394761 = 5509^2 + 1181^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 31743799 and 31743808.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 610433 + ... + 610484.

Almost surely, 2^31743842 is an apocalyptic number.

31743842 is a deficient number, since it is larger than the sum of its proper divisors (19534714).

31743842 is a wasteful number, since it uses less digits than its factorization.

31743842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1220932.

The product of its digits is 16128, while the sum is 32.

The square root of 31743842 is about 5634.1673741557. The cubic root of 31743842 is about 316.6308034486.

The spelling of 31743842 in words is "thirty-one million, seven hundred forty-three thousand, eight hundred forty-two".