422587831 has 2 divisors, whose sum is σ = 422587832. Its totient is φ = 422587830.

The previous prime is 422587829. The next prime is 422587859. The reversal of 422587831 is 138785224.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 422587831 - 2¹ = 422587829 is a prime.

It is a super-2 number, since 2×422587831² = 357160949818569122, which contains 22 as substring.

Together with 422587829, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (422587031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 211293915 + 211293916.

It is an arithmetic number, because the mean of its divisors is an integer number (211293916).

Almost surely, 2^422587831 is an apocalyptic number.

422587831 is a deficient number, since it is larger than the sum of its proper divisors (1).

422587831 is an equidigital number, since it uses as much as digits as its factorization.

422587831 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 107520, while the sum is 40.

The square root of 422587831 is about 20556.9411878324. The cubic root of 422587831 is about 750.4221806771.

The spelling of 422587831 in words is "four hundred twenty-two million, five hundred eighty-seven thousand, eight hundred thirty-one".