42535231 has 4 divisors (see below), whose sum is σ = 42549192. Its totient is φ = 42521272.

The previous prime is 42535223. The next prime is 42535261. The reversal of 42535231 is 13253524.

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 42535231 - 2³ = 42535223 is a prime.

It is a super-2 number, since 2×42535231² = 3618491752446722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 42535196 and 42535205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42535261) 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, 241 + ... + 9226.

It is an arithmetic number, because the mean of its divisors is an integer number (10637298).

Almost surely, 2^42535231 is an apocalyptic number.

42535231 is a deficient number, since it is larger than the sum of its proper divisors (13961).

42535231 is an equidigital number, since it uses as much as digits as its factorization.

42535231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13960.

The product of its digits is 3600, while the sum is 25.

The square root of 42535231 is about 6521.9039398016. The cubic root of 42535231 is about 349.0730054743.

Adding to 42535231 its reverse (13253524), we get a palindrome (55788755).

It can be divided in two parts, 4253523 and 1, that added together give a palindrome (4253524).

The spelling of 42535231 in words is "forty-two million, five hundred thirty-five thousand, two hundred thirty-one".