42534431 has 4 divisors (see below), whose sum is σ = 42547512. Its totient is φ = 42521352.

The previous prime is 42534419. The next prime is 42534451. The reversal of 42534431 is 13443524.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 42534431 - 2⁶ = 42534367 is a prime.

It is a super-2 number, since 2×42534431² = 3618355640987522, 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 42534431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42534451) 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 3 ways as a sum of consecutive naturals, for example, 2540 + ... + 9566.

It is an arithmetic number, because the mean of its divisors is an integer number (10636878).

Almost surely, 2^42534431 is an apocalyptic number.

42534431 is a deficient number, since it is larger than the sum of its proper divisors (13081).

42534431 is an equidigital number, since it uses as much as digits as its factorization.

42534431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13080.

The product of its digits is 5760, while the sum is 26.

The square root of 42534431 is about 6521.8426077298. The cubic root of 42534431 is about 349.0708170127.

Adding to 42534431 its reverse (13443524), we get a palindrome (55977955).

The spelling of 42534431 in words is "forty-two million, five hundred thirty-four thousand, four hundred thirty-one".