42228631 has 4 divisors (see below), whose sum is σ = 42703200. Its totient is φ = 41754064.

The previous prime is 42228587. The next prime is 42228679. The reversal of 42228631 is 13682224.

42228631 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 42228631 - 2⁷ = 42228503 is a prime.

It is a super-2 number, since 2×42228631² = 3566514552268322, 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 42228631.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42228691) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 237151 + ... + 237328.

It is an arithmetic number, because the mean of its divisors is an integer number (10675800).

Almost surely, 2^42228631 is an apocalyptic number.

42228631 is a deficient number, since it is larger than the sum of its proper divisors (474569).

42228631 is an equidigital number, since it uses as much as digits as its factorization.

42228631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 474568.

The product of its digits is 4608, while the sum is 28.

The square root of 42228631 is about 6498.3560228722. The cubic root of 42228631 is about 348.2322595164.

The spelling of 42228631 in words is "forty-two million, two hundred twenty-eight thousand, six hundred thirty-one".