455043221 has 2 divisors, whose sum is σ = 455043222. Its totient is φ = 455043220.

The previous prime is 455043209. The next prime is 455043227. The reversal of 455043221 is 122340554.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 272415025 + 182628196 = 16505^2 + 13514^2 .

It is a cyclic number.

It is not a de Polignac number, because 455043221 - 2¹⁰ = 455042197 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (455043227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 227521610 + 227521611.

It is an arithmetic number, because the mean of its divisors is an integer number (227521611).

Almost surely, 2^455043221 is an apocalyptic number.

It is an amenable number.

455043221 is a deficient number, since it is larger than the sum of its proper divisors (1).

455043221 is an equidigital number, since it uses as much as digits as its factorization.

455043221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4800, while the sum is 26.

The square root of 455043221 is about 21331.7420995098. The cubic root of 455043221 is about 769.1615210835.

Adding to 455043221 its reverse (122340554), we get a palindrome (577383775).

The spelling of 455043221 in words is "four hundred fifty-five million, forty-three thousand, two hundred twenty-one".