31839242 has 8 divisors (see below), whose sum is σ = 48413316. Its totient is φ = 15701472.

The previous prime is 31839239. The next prime is 31839251. The reversal of 31839242 is 24293813.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 30019441 + 1819801 = 5479^2 + 1349^2 .

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

It is a super-2 number, since 2×31839242² = 2027474662269128, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 31839199 and 31839208.

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, 108893 + ... + 109184.

Almost surely, 2^31839242 is an apocalyptic number.

31839242 is a deficient number, since it is larger than the sum of its proper divisors (16574074).

31839242 is a wasteful number, since it uses less digits than its factorization.

31839242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 218152.

The product of its digits is 10368, while the sum is 32.

The square root of 31839242 is about 5642.6272249724. The cubic root of 31839242 is about 316.9476771806.

The spelling of 31839242 in words is "thirty-one million, eight hundred thirty-nine thousand, two hundred forty-two".