42381831 has 8 divisors (see below), whose sum is σ = 56714224. Its totient is φ = 28152000.

The previous prime is 42381811. The next prime is 42381839. The reversal of 42381831 is 13818324.

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

It is not a de Polignac number, because 42381831 - 2⁶ = 42381767 is a prime.

It is a super-2 number, since 2×42381831² = 3592439197825122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42381839) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24670 + ... + 26331.

It is an arithmetic number, because the mean of its divisors is an integer number (7089278).

Almost surely, 2^42381831 is an apocalyptic number.

42381831 is a deficient number, since it is larger than the sum of its proper divisors (14332393).

42381831 is a wasteful number, since it uses less digits than its factorization.

42381831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51281.

The product of its digits is 4608, while the sum is 30.

The square root of 42381831 is about 6510.1329479512. The cubic root of 42381831 is about 348.6528651259.

The spelling of 42381831 in words is "forty-two million, three hundred eighty-one thousand, eight hundred thirty-one".