113623218 has 48 divisors (see below), whose sum is σ = 260933400. Its totient is φ = 35669760.

The previous prime is 113623207. The next prime is 113623231. The reversal of 113623218 is 812326311.

It is a happy number.

113623218 is a `hidden beast` number, since 1 + 13 + 623 + 21 + 8 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 30503529 + 83119689 = 5523^2 + 9117^2 .

It is a junction number, because it is equal to n+sod(n) for n = 113623191 and 113623200.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 18748 + ... + 24056.

Almost surely, 2^113623218 is an apocalyptic number.

113623218 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 113623218, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (130466700).

113623218 is an abundant number, since it is smaller than the sum of its proper divisors (147310182).

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

113623218 is a wasteful number, since it uses less digits than its factorization.

113623218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5387 (or 5384 counting only the distinct ones).

The product of its digits is 1728, while the sum is 27.

The square root of 113623218 is about 10659.4192149479. The cubic root of 113623218 is about 484.3459749961.

Adding to 113623218 its reverse (812326311), we get a palindrome (925949529).

The spelling of 113623218 in words is "one hundred thirteen million, six hundred twenty-three thousand, two hundred eighteen".