422505865 has 4 divisors (see below), whose sum is σ = 507007044. Its totient is φ = 338004688.

The previous prime is 422505847. The next prime is 422505911. The reversal of 422505865 is 568505224.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 171505216 + 251000649 = 13096^2 + 15843^2 .

It is a cyclic number.

It is not a de Polignac number, because 422505865 - 2⁵ = 422505833 is a prime.

It is a super-2 number, since 2×422505865² = 357022411918796450, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42250582 + ... + 42250591.

It is an arithmetic number, because the mean of its divisors is an integer number (126751761).

Almost surely, 2^422505865 is an apocalyptic number.

It is an amenable number.

422505865 is a deficient number, since it is larger than the sum of its proper divisors (84501179).

422505865 is an equidigital number, since it uses as much as digits as its factorization.

422505865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84501178.

The product of its (nonzero) digits is 96000, while the sum is 37.

The square root of 422505865 is about 20554.9474579723. The cubic root of 422505865 is about 750.3736597329.

The spelling of 422505865 in words is "four hundred twenty-two million, five hundred five thousand, eight hundred sixty-five".