113123220 has 48 divisors (see below), whose sum is σ = 361995648. Its totient is φ = 25856640.

The previous prime is 113123201. The next prime is 113123221. The reversal of 113123220 is 22321311.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 113123220.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (113123221) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 134251 + ... + 135090.

It is an arithmetic number, because the mean of its divisors is an integer number (7541576).

Almost surely, 2^113123220 is an apocalyptic number.

113123220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

113123220 is an abundant number, since it is smaller than the sum of its proper divisors (248872428).

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

113123220 is a wasteful number, since it uses less digits than its factorization.

113123220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 269360 (or 269358 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 113123220 is about 10635.9400148741. The cubic root of 113123220 is about 483.6344768846.

Adding to 113123220 its reverse (22321311), we get a palindrome (135444531).

The spelling of 113123220 in words is "one hundred thirteen million, one hundred twenty-three thousand, two hundred twenty".