223021343957 has 2 divisors, whose sum is σ = 223021343958. Its totient is φ = 223021343956.

The previous prime is 223021343953. The next prime is 223021344053. The reversal of 223021343957 is 759343120322.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 222716981041 + 304362916 = 471929^2 + 17446^2 .

It is a cyclic number.

It is not a de Polignac number, because 223021343957 - 2² = 223021343953 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (223021343953) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111510671978 + 111510671979.

It is an arithmetic number, because the mean of its divisors is an integer number (111510671979).

Almost surely, 2^223021343957 is an apocalyptic number.

It is an amenable number.

223021343957 is a deficient number, since it is larger than the sum of its proper divisors (1).

223021343957 is an equidigital number, since it uses as much as digits as its factorization.

223021343957 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 272160, while the sum is 41.

The spelling of 223021343957 in words is "two hundred twenty-three billion, twenty-one million, three hundred forty-three thousand, nine hundred fifty-seven".