422864251 has 2 divisors, whose sum is σ = 422864252. Its totient is φ = 422864250.

The previous prime is 422864237. The next prime is 422864291. The reversal of 422864251 is 152468224.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 422864251 - 2⁵ = 422864219 is a prime.

It is equal to p_22488712 and since 422864251 and 22488712 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (422864291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 211432125 + 211432126.

It is an arithmetic number, because the mean of its divisors is an integer number (211432126).

Almost surely, 2^422864251 is an apocalyptic number.

422864251 is a deficient number, since it is larger than the sum of its proper divisors (1).

422864251 is an equidigital number, since it uses as much as digits as its factorization.

422864251 is an evil number, because the sum of its binary digits is even.

The product of its digits is 30720, while the sum is 34.

The square root of 422864251 is about 20563.6633652664. The cubic root of 422864251 is about 750.5857652012.

The spelling of 422864251 in words is "four hundred twenty-two million, eight hundred sixty-four thousand, two hundred fifty-one".