42442631 has 32 divisors (see below), whose sum is σ = 55641600. Its totient is φ = 31409280.

The previous prime is 42442607. The next prime is 42442633. The reversal of 42442631 is 13624424.

It is not a de Polignac number, because 42442631 - 2¹⁴ = 42426247 is a prime.

It is a super-2 number, since 2×42442631² = 3602753852404322, 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 42442631.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42442633) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 185225 + ... + 185453.

It is an arithmetic number, because the mean of its divisors is an integer number (1738800).

Almost surely, 2^42442631 is an apocalyptic number.

42442631 is a deficient number, since it is larger than the sum of its proper divisors (13198969).

42442631 is a wasteful number, since it uses less digits than its factorization.

42442631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 359.

The product of its digits is 4608, while the sum is 26.

The square root of 42442631 is about 6514.8009179099. The cubic root of 42442631 is about 348.8195085908.

The spelling of 42442631 in words is "forty-two million, four hundred forty-two thousand, six hundred thirty-one".