42538431 has 32 divisors (see below), whose sum is σ = 65157120. Its totient is φ = 24482304.

The previous prime is 42538429. The next prime is 42538453. The reversal of 42538431 is 13483524.

It is not a de Polignac number, because 42538431 - 2¹ = 42538429 is a prime.

It is a super-2 number, since 2×42538431² = 3619036223883522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42538421) 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, 41655 + ... + 42663.

It is an arithmetic number, because the mean of its divisors is an integer number (2036160).

Almost surely, 2^42538431 is an apocalyptic number.

42538431 is a deficient number, since it is larger than the sum of its proper divisors (22618689).

42538431 is a wasteful number, since it uses less digits than its factorization.

42538431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1095.

The product of its digits is 11520, while the sum is 30.

The square root of 42538431 is about 6522.1492623214. The cubic root of 42538431 is about 349.0817590461.

The spelling of 42538431 in words is "forty-two million, five hundred thirty-eight thousand, four hundred thirty-one".