223444195657 has 2 divisors, whose sum is σ = 223444195658. Its totient is φ = 223444195656.

The previous prime is 223444195651. The next prime is 223444195717. The reversal of 223444195657 is 756591444322.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 210354318736 + 13089876921 = 458644^2 + 114411^2 .

It is a cyclic number.

It is not a de Polignac number, because 223444195657 - 2¹⁹ = 223443671369 is a prime.

It is not a weakly prime, because it can be changed into another prime (223444195651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111722097828 + 111722097829.

It is an arithmetic number, because the mean of its divisors is an integer number (111722097829).

Almost surely, 2^223444195657 is an apocalyptic number.

It is an amenable number.

223444195657 is a deficient number, since it is larger than the sum of its proper divisors (1).

223444195657 is an equidigital number, since it uses as much as digits as its factorization.

223444195657 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7257600, while the sum is 52.

The spelling of 223444195657 in words is "two hundred twenty-three billion, four hundred forty-four million, one hundred ninety-five thousand, six hundred fifty-seven".