31663444 has 12 divisors (see below), whose sum is σ = 56191968. Its totient is φ = 15608600.

The previous prime is 31663417. The next prime is 31663559. The reversal of 31663444 is 44436613.

It is a happy number.

It is a super-2 number, since 2×31663444² = 2005147371882272, which contains 22 as substring.

It is a congruent number.

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, 55462 + ... + 56029.

It is an arithmetic number, because the mean of its divisors is an integer number (4682664).

Almost surely, 2^31663444 is an apocalyptic number.

It is an amenable number.

31663444 is a deficient number, since it is larger than the sum of its proper divisors (24528524).

31663444 is a wasteful number, since it uses less digits than its factorization.

31663444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111566 (or 111564 counting only the distinct ones).

The product of its digits is 20736, while the sum is 31.

The square root of 31663444 is about 5627.0279899784. The cubic root of 31663444 is about 316.3632659428.

The spelling of 31663444 in words is "thirty-one million, six hundred sixty-three thousand, four hundred forty-four".