223045651421 has 2 divisors, whose sum is σ = 223045651422. Its totient is φ = 223045651420.

The previous prime is 223045651373. The next prime is 223045651427. The reversal of 223045651421 is 124156540322.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 164013660196 + 59031991225 = 404986^2 + 242965^2 .

It is a cyclic number.

It is not a de Polignac number, because 223045651421 - 2²² = 223041457117 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (223045651427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111522825710 + 111522825711.

It is an arithmetic number, because the mean of its divisors is an integer number (111522825711).

Almost surely, 2^223045651421 is an apocalyptic number.

It is an amenable number.

223045651421 is a deficient number, since it is larger than the sum of its proper divisors (1).

223045651421 is an equidigital number, since it uses as much as digits as its factorization.

223045651421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 57600, while the sum is 35.

The spelling of 223045651421 in words is "two hundred twenty-three billion, forty-five million, six hundred fifty-one thousand, four hundred twenty-one".