422993581 has 4 divisors (see below), whose sum is σ = 429927964. Its totient is φ = 416059200.

The previous prime is 422993569. The next prime is 422993587. The reversal of 422993581 is 185399224.

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 7241481 + 415752100 = 2691^2 + 20390^2 .

It is a cyclic number.

It is not a de Polignac number, because 422993581 - 2⁷ = 422993453 is a prime.

It is a super-2 number, since 2×422993581² = 357847139134407122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (422993587) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3467100 + ... + 3467221.

It is an arithmetic number, because the mean of its divisors is an integer number (107481991).

Almost surely, 2^422993581 is an apocalyptic number.

It is an amenable number.

422993581 is a deficient number, since it is larger than the sum of its proper divisors (6934383).

422993581 is an equidigital number, since it uses as much as digits as its factorization.

422993581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6934382.

The product of its digits is 155520, while the sum is 43.

The square root of 422993581 is about 20566.8077493810. The cubic root of 422993581 is about 750.6622778268.

The spelling of 422993581 in words is "four hundred twenty-two million, nine hundred ninety-three thousand, five hundred eighty-one".