422521631 has 16 divisors (see below), whose sum is σ = 491232000. Its totient is φ = 355924800.

The previous prime is 422521613. The next prime is 422521633. The reversal of 422521631 is 136125224.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-422521631 is a prime.

It is a super-2 number, since 2×422521631² = 357049057325800322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 422521631.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (422521633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 281120 + ... + 282618.

It is an arithmetic number, because the mean of its divisors is an integer number (30702000).

Almost surely, 2^422521631 is an apocalyptic number.

422521631 is a deficient number, since it is larger than the sum of its proper divisors (68710369).

422521631 is a wasteful number, since it uses less digits than its factorization.

422521631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2174.

The product of its digits is 2880, while the sum is 26.

The square root of 422521631 is about 20555.3309630373. The cubic root of 422521631 is about 750.3829931291.

Adding to 422521631 its reverse (136125224), we get a palindrome (558646855).

The spelling of 422521631 in words is "four hundred twenty-two million, five hundred twenty-one thousand, six hundred thirty-one".