422331631 has 6 divisors (see below), whose sum is σ = 436395696. Its totient is φ = 408707100.

The previous prime is 422331607. The next prime is 422331641. The reversal of 422331631 is 136133224.

It is a de Polignac number, because none of the positive numbers 2^k-422331631 is a prime.

It is a super-2 number, since 2×422331631² = 356728013086240322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 422331596 and 422331605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (422331641) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 218775 + ... + 220696.

It is an arithmetic number, because the mean of its divisors is an integer number (72732616).

Almost surely, 2^422331631 is an apocalyptic number.

422331631 is a deficient number, since it is larger than the sum of its proper divisors (14064065).

422331631 is an equidigital number, since it uses as much as digits as its factorization.

422331631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 439533 (or 439502 counting only the distinct ones).

The product of its digits is 2592, while the sum is 25.

The square root of 422331631 is about 20550.7087712322. The cubic root of 422331631 is about 750.2704985771.

Adding to 422331631 its reverse (136133224), we get a palindrome (558464855).

The spelling of 422331631 in words is "four hundred twenty-two million, three hundred thirty-one thousand, six hundred thirty-one".