113637220 has 12 divisors (see below), whose sum is σ = 238638204. Its totient is φ = 45454880.

The previous prime is 113637217. The next prime is 113637263. The reversal of 113637220 is 22736311.

It can be written as a sum of positive squares in 2 ways, for example, as 11546404 + 102090816 = 3398^2 + 10104^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2840911 + ... + 2840950.

It is an arithmetic number, because the mean of its divisors is an integer number (19886517).

Almost surely, 2^113637220 is an apocalyptic number.

113637220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

113637220 is an abundant number, since it is smaller than the sum of its proper divisors (125000984).

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

113637220 is a wasteful number, since it uses less digits than its factorization.

113637220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5681870 (or 5681868 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 25.

The square root of 113637220 is about 10660.0759847198. The cubic root of 113637220 is about 484.3658697967.

Subtracting from 113637220 its reverse (22736311), we obtain a palindrome (90900909).

The spelling of 113637220 in words is "one hundred thirteen million, six hundred thirty-seven thousand, two hundred twenty".