422731129 has 4 divisors (see below), whose sum is σ = 447597684. Its totient is φ = 397864576.

The previous prime is 422731121. The next prime is 422731187. The reversal of 422731129 is 921137224.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 307125625 + 115605504 = 17525^2 + 10752^2 .

It is a cyclic number.

It is not a de Polignac number, because 422731129 - 2³ = 422731121 is a prime.

It is a super-2 number, since 2×422731129² = 357403214851229282, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 422731129.

It is not an unprimeable number, because it can be changed into a prime (422731121) 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, 12433252 + ... + 12433285.

It is an arithmetic number, because the mean of its divisors is an integer number (111899421).

Almost surely, 2^422731129 is an apocalyptic number.

It is an amenable number.

422731129 is a deficient number, since it is larger than the sum of its proper divisors (24866555).

422731129 is a wasteful number, since it uses less digits than its factorization.

422731129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24866554.

The product of its digits is 6048, while the sum is 31.

The square root of 422731129 is about 20560.4262844913. The cubic root of 422731129 is about 750.5069929041.

The spelling of 422731129 in words is "four hundred twenty-two million, seven hundred thirty-one thousand, one hundred twenty-nine".