456291221 has 2 divisors, whose sum is σ = 456291222. Its totient is φ = 456291220.

The previous prime is 456291197. The next prime is 456291229. The reversal of 456291221 is 122192654.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 282710596 + 173580625 = 16814^2 + 13175^2 .

It is a cyclic number.

It is not a de Polignac number, because 456291221 - 2¹⁴ = 456274837 is a prime.

It is a Sophie Germain prime.

It is a Chen 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 (456291229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 228145610 + 228145611.

It is an arithmetic number, because the mean of its divisors is an integer number (228145611).

Almost surely, 2^456291221 is an apocalyptic number.

It is an amenable number.

456291221 is a deficient number, since it is larger than the sum of its proper divisors (1).

456291221 is an equidigital number, since it uses as much as digits as its factorization.

456291221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8640, while the sum is 32.

The square root of 456291221 is about 21360.9742521262. The cubic root of 456291221 is about 769.8640458231.

The spelling of 456291221 in words is "four hundred fifty-six million, two hundred ninety-one thousand, two hundred twenty-one".