42338431 has 4 divisors (see below), whose sum is σ = 42381000. Its totient is φ = 42295864.

The previous prime is 42338411. The next prime is 42338447. The reversal of 42338431 is 13483324.

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 42338431 - 2¹¹ = 42336383 is a prime.

It is a super-2 number, since 2×42338431² = 3585085479083522, 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 42338431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42338411) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19756 + ... + 21793.

It is an arithmetic number, because the mean of its divisors is an integer number (10595250).

Almost surely, 2^42338431 is an apocalyptic number.

42338431 is a deficient number, since it is larger than the sum of its proper divisors (42569).

42338431 is a wasteful number, since it uses less digits than its factorization.

42338431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42568.

The product of its digits is 6912, while the sum is 28.

The square root of 42338431 is about 6506.7988289173. The cubic root of 42338431 is about 348.5338148792.

The spelling of 42338431 in words is "forty-two million, three hundred thirty-eight thousand, four hundred thirty-one".