42256231 has 4 divisors (see below), whose sum is σ = 42791200. Its totient is φ = 41721264.

The previous prime is 42256189. The next prime is 42256241. The reversal of 42256231 is 13265224.

42256231 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 42256231 - 2¹¹ = 42254183 is a prime.

It is a super-2 number, since 2×42256231² = 3571178116650722, 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 = 42256196 and 42256205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42256241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 267366 + ... + 267523.

It is an arithmetic number, because the mean of its divisors is an integer number (10697800).

Almost surely, 2^42256231 is an apocalyptic number.

42256231 is a deficient number, since it is larger than the sum of its proper divisors (534969).

42256231 is an equidigital number, since it uses as much as digits as its factorization.

42256231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 534968.

The product of its digits is 2880, while the sum is 25.

The square root of 42256231 is about 6500.4792900216. The cubic root of 42256231 is about 348.3081094550.

The spelling of 42256231 in words is "forty-two million, two hundred fifty-six thousand, two hundred thirty-one".