31663104 has 88 divisors (see below), whose sum is σ = 92164128. Its totient is φ = 9584640.

The previous prime is 31663103. The next prime is 31663133. The reversal of 31663104 is 40136613.

It is a tau number, because it is divible by the number of its divisors (88).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is not an unprimeable number, because it can be changed into a prime (31663103) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33324 + ... + 34260.

Almost surely, 2^31663104 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31663104, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (46082064).

31663104 is an abundant number, since it is smaller than the sum of its proper divisors (60501024).

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

31663104 is a wasteful number, since it uses less digits than its factorization.

31663104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 971 (or 953 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 24.

The square root of 31663104 is about 5626.9977785672. The cubic root of 31663104 is about 316.3621335760.

Adding to 31663104 its reverse (40136613), we get a palindrome (71799717).

The spelling of 31663104 in words is "thirty-one million, six hundred sixty-three thousand, one hundred four".