42381631 has 8 divisors (see below), whose sum is σ = 42762240. Its totient is φ = 42003192.

The previous prime is 42381611. The next prime is 42381637. The reversal of 42381631 is 13618324.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 42381631 - 2¹¹ = 42379583 is a prime.

It is a super-2 number, since 2×42381631² = 3592405292440322, 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 42381631.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42381637) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 91306 + ... + 91768.

It is an arithmetic number, because the mean of its divisors is an integer number (5345280).

Almost surely, 2^42381631 is an apocalyptic number.

42381631 is a deficient number, since it is larger than the sum of its proper divisors (380609).

42381631 is a wasteful number, since it uses less digits than its factorization.

42381631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1085.

The product of its digits is 3456, while the sum is 28.

The square root of 42381631 is about 6510.1175872637. The cubic root of 42381631 is about 348.6523166937.

Adding to 42381631 its reverse (13618324), we get a palindrome (55999955).

The spelling of 42381631 in words is "forty-two million, three hundred eighty-one thousand, six hundred thirty-one".