113533220 has 12 divisors (see below), whose sum is σ = 238419804. Its totient is φ = 45413280.

The previous prime is 113533207. The next prime is 113533237. The reversal of 113533220 is 22335311.

It can be written as a sum of positive squares in 2 ways, for example, as 25623844 + 87909376 = 5062^2 + 9376^2 .

It is a Harshad number since it is a multiple of its sum of digits (20), and also a Moran number because the ratio is a prime number: 5676661 = 113533220 / (1 + 1 + 3 + 5 + 3 + 3 + 2 + 2 + 0).

It is a junction number, because it is equal to n+sod(n) for n = 113533192 and 113533201.

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, 2838311 + ... + 2838350.

It is an arithmetic number, because the mean of its divisors is an integer number (19868317).

Almost surely, 2^113533220 is an apocalyptic number.

113533220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

113533220 is an abundant number, since it is smaller than the sum of its proper divisors (124886584).

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

113533220 is a wasteful number, since it uses less digits than its factorization.

113533220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5676670 (or 5676668 counting only the distinct ones).

The product of its (nonzero) digits is 540, while the sum is 20.

The square root of 113533220 is about 10655.1968541177. The cubic root of 113533220 is about 484.2180619288.

Adding to 113533220 its reverse (22335311), we get a palindrome (135868531).

The spelling of 113533220 in words is "one hundred thirteen million, five hundred thirty-three thousand, two hundred twenty".