113445221 has 2 divisors, whose sum is σ = 113445222. Its totient is φ = 113445220.

The previous prime is 113445193. The next prime is 113445247. The reversal of 113445221 is 122544311.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 74632321 + 38812900 = 8639^2 + 6230^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-113445221 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (113445251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 56722610 + 56722611.

It is an arithmetic number, because the mean of its divisors is an integer number (56722611).

Almost surely, 2^113445221 is an apocalyptic number.

It is an amenable number.

113445221 is a deficient number, since it is larger than the sum of its proper divisors (1).

113445221 is an equidigital number, since it uses as much as digits as its factorization.

113445221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 960, while the sum is 23.

The square root of 113445221 is about 10651.0666601989. The cubic root of 113445221 is about 484.0929246369.

Adding to 113445221 its reverse (122544311), we get a palindrome (235989532).

The spelling of 113445221 in words is "one hundred thirteen million, four hundred forty-five thousand, two hundred twenty-one".