113447221 has 2 divisors, whose sum is σ = 113447222. Its totient is φ = 113447220.

The previous prime is 113447219. The next prime is 113447227. The reversal of 113447221 is 122744311.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 99720196 + 13727025 = 9986^2 + 3705^2 .

It is a cyclic number.

It is not a de Polignac number, because 113447221 - 2¹ = 113447219 is a prime.

Together with 113447219, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (113447227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 56723610 + 56723611.

It is an arithmetic number, because the mean of its divisors is an integer number (56723611).

Almost surely, 2^113447221 is an apocalyptic number.

It is an amenable number.

113447221 is a deficient number, since it is larger than the sum of its proper divisors (1).

113447221 is an equidigital number, since it uses as much as digits as its factorization.

113447221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1344, while the sum is 25.

The square root of 113447221 is about 10651.1605470953. The cubic root of 113447221 is about 484.0957694171.

The spelling of 113447221 in words is "one hundred thirteen million, four hundred forty-seven thousand, two hundred twenty-one".