422313021 has 20 divisors (see below), whose sum is σ = 679392252. Its totient is φ = 259884288.

The previous prime is 422313007. The next prime is 422313043. The reversal of 422313021 is 120313224.

It can be written as a sum of positive squares in 2 ways, for example, as 22752900 + 399560121 = 4770^2 + 19989^2 .

It is not a de Polignac number, because 422313021 - 2⁷ = 422312893 is a prime.

It is a super-2 number, since 2×422313021² = 356696575412292882, which contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 422312985 and 422313003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (422313061) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 199476 + ... + 201581.

Almost surely, 2^422313021 is an apocalyptic number.

It is an amenable number.

422313021 is a deficient number, since it is larger than the sum of its proper divisors (257079231).

422313021 is a wasteful number, since it uses less digits than its factorization.

422313021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 401082 (or 401073 counting only the distinct ones).

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

The square root of 422313021 is about 20550.2559838071. The cubic root of 422313021 is about 750.2594782177.

Adding to 422313021 its reverse (120313224), we get a palindrome (542626245).

The spelling of 422313021 in words is "four hundred twenty-two million, three hundred thirteen thousand, twenty-one".