223021400257 has 2 divisors, whose sum is σ = 223021400258. Its totient is φ = 223021400256.

The previous prime is 223021400209. The next prime is 223021400291. The reversal of 223021400257 is 752004120322.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 198702869121 + 24318531136 = 445761^2 + 155944^2 .

It is a cyclic number.

It is not a de Polignac number, because 223021400257 - 2³¹ = 220873916609 is a prime.

It is not a weakly prime, because it can be changed into another prime (223021409257) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111510700128 + 111510700129.

It is an arithmetic number, because the mean of its divisors is an integer number (111510700129).

Almost surely, 2^223021400257 is an apocalyptic number.

It is an amenable number.

223021400257 is a deficient number, since it is larger than the sum of its proper divisors (1).

223021400257 is an equidigital number, since it uses as much as digits as its factorization.

223021400257 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6720, while the sum is 28.

Adding to 223021400257 its reverse (752004120322), we get a palindrome (975025520579).

The spelling of 223021400257 in words is "two hundred twenty-three billion, twenty-one million, four hundred thousand, two hundred fifty-seven".