31616104 has 32 divisors (see below), whose sum is σ = 64449000. Its totient is φ = 14452992.

The previous prime is 31616069. The next prime is 31616113. The reversal of 31616104 is 40161613.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 26316900 + 5299204 = 5130^2 + 2302^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9942 + ... + 12730.

Almost surely, 2^31616104 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 31616104, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32224500).

31616104 is an abundant number, since it is smaller than the sum of its proper divisors (32832896).

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

31616104 is a wasteful number, since it uses less digits than its factorization.

31616104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2917 (or 2913 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 31616104 is about 5622.8199330941. The cubic root of 31616104 is about 316.2055224466.

Adding to 31616104 its reverse (40161613), we get a palindrome (71777717).

The spelling of 31616104 in words is "thirty-one million, six hundred sixteen thousand, one hundred four".