31200104 has 48 divisors (see below), whose sum is σ = 64825920. Its totient is φ = 14064960.

The previous prime is 31200089. The next prime is 31200137. The reversal of 31200104 is 40100213.

It is a happy number.

It is a super-2 number, since 2×31200104² = 1946892979221632, which contains 22 as substring.

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, 63299 + ... + 63789.

It is an arithmetic number, because the mean of its divisors is an integer number (1350540).

Almost surely, 2^31200104 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 31200104, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32412960).

31200104 is an abundant number, since it is smaller than the sum of its proper divisors (33625816).

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

31200104 is a wasteful number, since it uses less digits than its factorization.

31200104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 570 (or 553 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 31200104 is about 5585.7053269932. The cubic root of 31200104 is about 314.8125331172.

Adding to 31200104 its reverse (40100213), we get a palindrome (71300317).

The spelling of 31200104 in words is "thirty-one million, two hundred thousand, one hundred four".