42557233 has 4 divisors (see below), whose sum is σ = 42603120. Its totient is φ = 42511348.

The previous prime is 42557167. The next prime is 42557237. The reversal of 42557233 is 33275524.

42557233 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, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 42557233 - 2²⁵ = 9002801 is a prime.

It is a super-2 number, since 2×42557233² = 3622236161232578, 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 = 42557195 and 42557204.

It is not an unprimeable number, because it can be changed into a prime (42557237) 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, 21523 + ... + 23416.

It is an arithmetic number, because the mean of its divisors is an integer number (10650780).

Almost surely, 2^42557233 is an apocalyptic number.

It is an amenable number.

42557233 is a deficient number, since it is larger than the sum of its proper divisors (45887).

42557233 is an equidigital number, since it uses as much as digits as its factorization.

42557233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45886.

The product of its digits is 25200, while the sum is 31.

The square root of 42557233 is about 6523.5904991040. The cubic root of 42557233 is about 349.1331828865.

The spelling of 42557233 in words is "forty-two million, five hundred fifty-seven thousand, two hundred thirty-three".