221234423953 has 2 divisors, whose sum is σ = 221234423954. Its totient is φ = 221234423952.

The previous prime is 221234423903. The next prime is 221234424011. The reversal of 221234423953 is 359324432122.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 161083427904 + 60150996049 = 401352^2 + 245257^2 .

It is a cyclic number.

It is not a de Polignac number, because 221234423953 - 2⁹ = 221234423441 is a prime.

It is not a weakly prime, because it can be changed into another prime (221234423903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110617211976 + 110617211977.

It is an arithmetic number, because the mean of its divisors is an integer number (110617211977).

Almost surely, 2^221234423953 is an apocalyptic number.

It is an amenable number.

221234423953 is a deficient number, since it is larger than the sum of its proper divisors (1).

221234423953 is an equidigital number, since it uses as much as digits as its factorization.

221234423953 is an evil number, because the sum of its binary digits is even.

The product of its digits is 311040, while the sum is 40.

The spelling of 221234423953 in words is "two hundred twenty-one billion, two hundred thirty-four million, four hundred twenty-three thousand, nine hundred fifty-three".