113243221 has 16 divisors (see below), whose sum is σ = 141293824. Its totient is φ = 88366464.

The previous prime is 113243177. The next prime is 113243227. The reversal of 113243221 is 122342311.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 113243221 - 2¹¹ = 113241173 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (113243227) 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, 1881 + ... + 15166.

It is an arithmetic number, because the mean of its divisors is an integer number (8830864).

Almost surely, 2^113243221 is an apocalyptic number.

It is an amenable number.

113243221 is a deficient number, since it is larger than the sum of its proper divisors (28050603).

113243221 is a wasteful number, since it uses less digits than its factorization.

113243221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17140.

The product of its digits is 288, while the sum is 19.

The square root of 113243221 is about 10641.5798169257. The cubic root of 113243221 is about 483.8054294418.

Adding to 113243221 its reverse (122342311), we get a palindrome (235585532).

The spelling of 113243221 in words is "one hundred thirteen million, two hundred forty-three thousand, two hundred twenty-one".