422521357 has 2 divisors, whose sum is σ = 422521358. Its totient is φ = 422521356.

The previous prime is 422521343. The next prime is 422521367. The reversal of 422521357 is 753125224.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 251983876 + 170537481 = 15874^2 + 13059^2 .

It is a cyclic number.

It is not a de Polignac number, because 422521357 - 2¹⁵ = 422488589 is a prime.

It is a super-2 number, since 2×422521357² = 357048594242242898, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (422521367) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 211260678 + 211260679.

It is an arithmetic number, because the mean of its divisors is an integer number (211260679).

Almost surely, 2^422521357 is an apocalyptic number.

It is an amenable number.

422521357 is a deficient number, since it is larger than the sum of its proper divisors (1).

422521357 is an equidigital number, since it uses as much as digits as its factorization.

422521357 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16800, while the sum is 31.

The square root of 422521357 is about 20555.3242980985. The cubic root of 422521357 is about 750.3828309244.

The spelling of 422521357 in words is "four hundred twenty-two million, five hundred twenty-one thousand, three hundred fifty-seven".