113530221 has 16 divisors (see below), whose sum is σ = 192220800. Its totient is φ = 64874304.

The previous prime is 113530177. The next prime is 113530223. The reversal of 113530221 is 122035311.

113530221 is a `hidden beast` number, since 113 + 530 + 2 + 21 = 666.

It is not a de Polignac number, because 113530221 - 2¹⁰ = 113529197 is a prime.

It is a super-2 number, since 2×113530221² = 25778222160617682, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 113530194 and 113530203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (113530223) 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, 300156 + ... + 300533.

It is an arithmetic number, because the mean of its divisors is an integer number (12013800).

Almost surely, 2^113530221 is an apocalyptic number.

It is an amenable number.

113530221 is a deficient number, since it is larger than the sum of its proper divisors (78690579).

113530221 is an equidigital number, since it uses as much as digits as its factorization.

113530221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 600705 (or 600699 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 18.

The square root of 113530221 is about 10655.0561237377. The cubic root of 113530221 is about 484.2137983228.

Adding to 113530221 its reverse (122035311), we get a palindrome (235565532).

The spelling of 113530221 in words is "one hundred thirteen million, five hundred thirty thousand, two hundred twenty-one".