457497221 has 2 divisors, whose sum is σ = 457497222. Its totient is φ = 457497220.

The previous prime is 457497203. The next prime is 457497241. The reversal of 457497221 is 122794754.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 353966596 + 103530625 = 18814^2 + 10175^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-457497221 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 (457497241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 228748610 + 228748611.

It is an arithmetic number, because the mean of its divisors is an integer number (228748611).

Almost surely, 2^457497221 is an apocalyptic number.

It is an amenable number.

457497221 is a deficient number, since it is larger than the sum of its proper divisors (1).

457497221 is an equidigital number, since it uses as much as digits as its factorization.

457497221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 141120, while the sum is 41.

The square root of 457497221 is about 21389.1846735681. The cubic root of 457497221 is about 770.5417119061.

The spelling of 457497221 in words is "four hundred fifty-seven million, four hundred ninety-seven thousand, two hundred twenty-one".