31663044 has 144 divisors (see below), whose sum is σ = 102211200. Its totient is φ = 8045568.

The previous prime is 31663013. The next prime is 31663057. The reversal of 31663044 is 44036613.

It is a junction number, because it is equal to n+sod(n) for n = 31662999 and 31663017.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 81202 + ... + 81590.

It is an arithmetic number, because the mean of its divisors is an integer number (709800).

Almost surely, 2^31663044 is an apocalyptic number.

31663044 is a gapful number since it is divisible by the number (34) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31663044, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (51105600).

31663044 is an abundant number, since it is smaller than the sum of its proper divisors (70548156).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31663044 is a wasteful number, since it uses less digits than its factorization.

31663044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 442 (or 437 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 27.

The square root of 31663044 is about 5626.9924471248. The cubic root of 31663044 is about 316.3619337457.

Adding to 31663044 its reverse (44036613), we get a palindrome (75699657).

The spelling of 31663044 in words is "thirty-one million, six hundred sixty-three thousand, forty-four".