223948767221 has 2 divisors, whose sum is σ = 223948767222. Its totient is φ = 223948767220.

The previous prime is 223948767193. The next prime is 223948767241. The reversal of 223948767221 is 122767849322.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 165982908100 + 57965859121 = 407410^2 + 240761^2 .

It is a cyclic number.

It is not a de Polignac number, because 223948767221 - 2⁶ = 223948767157 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (223948767241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111974383610 + 111974383611.

It is an arithmetic number, because the mean of its divisors is an integer number (111974383611).

Almost surely, 2^223948767221 is an apocalyptic number.

It is an amenable number.

223948767221 is a deficient number, since it is larger than the sum of its proper divisors (1).

223948767221 is an equidigital number, since it uses as much as digits as its factorization.

223948767221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4064256, while the sum is 53.

The spelling of 223948767221 in words is "two hundred twenty-three billion, nine hundred forty-eight million, seven hundred sixty-seven thousand, two hundred twenty-one".