113403221 has 2 divisors, whose sum is σ = 113403222. Its totient is φ = 113403220.

The previous prime is 113403217. The next prime is 113403299. The reversal of 113403221 is 122304311.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 90459121 + 22944100 = 9511^2 + 4790^2 .

It is a cyclic number.

It is not a de Polignac number, because 113403221 - 2² = 113403217 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 113403221.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (113403211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 56701610 + 56701611.

It is an arithmetic number, because the mean of its divisors is an integer number (56701611).

Almost surely, 2^113403221 is an apocalyptic number.

It is an amenable number.

113403221 is a deficient number, since it is larger than the sum of its proper divisors (1).

113403221 is an equidigital number, since it uses as much as digits as its factorization.

113403221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 113403221 is about 10649.0948441640. The cubic root of 113403221 is about 484.0331765274.

Adding to 113403221 its reverse (122304311), we get a palindrome (235707532).

The spelling of 113403221 in words is "one hundred thirteen million, four hundred three thousand, two hundred twenty-one".