422552021 has 4 divisors (see below), whose sum is σ = 440923872. Its totient is φ = 404180172.

The previous prime is 422551999. The next prime is 422552033. The reversal of 422552021 is 120255224.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 422552021 - 2⁶ = 422551957 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23), and also a Moran number because the ratio is a prime number: 18371827 = 422552021 / (4 + 2 + 2 + 5 + 5 + 2 + 0 + 2 + 1).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (422552521) 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, 9185891 + ... + 9185936.

It is an arithmetic number, because the mean of its divisors is an integer number (110230968).

Almost surely, 2^422552021 is an apocalyptic number.

It is an amenable number.

422552021 is a deficient number, since it is larger than the sum of its proper divisors (18371851).

422552021 is a wasteful number, since it uses less digits than its factorization.

422552021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18371850.

The product of its (nonzero) digits is 1600, while the sum is 23.

The square root of 422552021 is about 20556.0701740386. The cubic root of 422552021 is about 750.4009832080.

The spelling of 422552021 in words is "four hundred twenty-two million, five hundred fifty-two thousand, twenty-one".