31153104 has 60 divisors (see below), whose sum is σ = 89059776. Its totient is φ = 10161216.

The previous prime is 31153093. The next prime is 31153169. The reversal of 31153104 is 40135113.

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 11 ways as a sum of consecutive naturals, for example, 4467 + ... + 9069.

Almost surely, 2^31153104 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 31153104, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44529888).

31153104 is an abundant number, since it is smaller than the sum of its proper divisors (57906672).

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

31153104 is a wasteful number, since it uses less digits than its factorization.

31153104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4664 (or 4655 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 18.

The square root of 31153104 is about 5581.4965735007. The cubic root of 31153104 is about 314.6543752580.

Adding to 31153104 its reverse (40135113), we get a palindrome (71288217).

Subtracting 31153104 from its reverse (40135113), we obtain a square (8982009 = 2997²).

The spelling of 31153104 in words is "thirty-one million, one hundred fifty-three thousand, one hundred four".