31252104 has 96 divisors (see below), whose sum is σ = 92153880. Its totient is φ = 9510912.

The previous prime is 31252097. The next prime is 31252121. The reversal of 31252104 is 40125213.

It can be written as a sum of positive squares in 4 ways, for example, as 24502500 + 6749604 = 4950^2 + 2598^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 161832 + ... + 162024.

Almost surely, 2^31252104 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 31252104, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (46076940).

31252104 is an abundant number, since it is smaller than the sum of its proper divisors (60901776).

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

31252104 is a wasteful number, since it uses less digits than its factorization.

31252104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 391 (or 384 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 31252104 is about 5590.3581280630. The cubic root of 31252104 is about 314.9873313121.

Adding to 31252104 its reverse (40125213), we get a palindrome (71377317).

The spelling of 31252104 in words is "thirty-one million, two hundred fifty-two thousand, one hundred four".