422331021 has 24 divisors (see below), whose sum is σ = 698216064. Its totient is φ = 240973920.

The previous prime is 422330981. The next prime is 422331071. The reversal of 422331021 is 120133224.

It is not a de Polignac number, because 422331021 - 2⁶ = 422330957 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 422330985 and 422331003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (422331071) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 41191 + ... + 50411.

It is an arithmetic number, because the mean of its divisors is an integer number (29092336).

Almost surely, 2^422331021 is an apocalyptic number.

It is an amenable number.

422331021 is a deficient number, since it is larger than the sum of its proper divisors (275885043).

422331021 is a wasteful number, since it uses less digits than its factorization.

422331021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9961 (or 9958 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 422331021 is about 20550.6939298896. The cubic root of 422331021 is about 750.2701373561.

Adding to 422331021 its reverse (120133224), we get a palindrome (542464245).

The spelling of 422331021 in words is "four hundred twenty-two million, three hundred thirty-one thousand, twenty-one".