422662591 has 4 divisors (see below), whose sum is σ = 455175112. Its totient is φ = 390150072.

The previous prime is 422662577. The next prime is 422662621. The reversal of 422662591 is 195266224.

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

It is not a de Polignac number, because 422662591 - 2¹³ = 422654399 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 422662591.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (422662291) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16256241 + ... + 16256266.

It is an arithmetic number, because the mean of its divisors is an integer number (113793778).

Almost surely, 2^422662591 is an apocalyptic number.

422662591 is a deficient number, since it is larger than the sum of its proper divisors (32512521).

422662591 is a wasteful number, since it uses less digits than its factorization.

422662591 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32512520.

The product of its digits is 51840, while the sum is 37.

The square root of 422662591 is about 20558.7594713300. The cubic root of 422662591 is about 750.4664304560.

The spelling of 422662591 in words is "four hundred twenty-two million, six hundred sixty-two thousand, five hundred ninety-one".