42668631 has 12 divisors (see below), whose sum is σ = 61927320. Its totient is φ = 28309680.

The previous prime is 42668629. The next prime is 42668693. The reversal of 42668631 is 13686624.

It is not a de Polignac number, because 42668631 - 2¹ = 42668629 is a prime.

It is a super-2 number, since 2×42668631² = 3641224142828322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42668531) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9336 + ... + 13133.

It is an arithmetic number, because the mean of its divisors is an integer number (5160610).

Almost surely, 2^42668631 is an apocalyptic number.

42668631 is a deficient number, since it is larger than the sum of its proper divisors (19258689).

42668631 is a wasteful number, since it uses less digits than its factorization.

42668631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22686 (or 22683 counting only the distinct ones).

The product of its digits is 41472, while the sum is 36.

The square root of 42668631 is about 6532.1230086397. The cubic root of 42668631 is about 349.4375483223.

The spelling of 42668631 in words is "forty-two million, six hundred sixty-eight thousand, six hundred thirty-one".