42557323 has 2 divisors, whose sum is σ = 42557324. Its totient is φ = 42557322.

The previous prime is 42557311. The next prime is 42557353. The reversal of 42557323 is 32375524.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42557323 - 2²¹ = 40460171 is a prime.

It is a super-2 number, since 2×42557323² = 3622251481852658, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (42557353) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21278661 + 21278662.

It is an arithmetic number, because the mean of its divisors is an integer number (21278662).

Almost surely, 2^42557323 is an apocalyptic number.

42557323 is a deficient number, since it is larger than the sum of its proper divisors (1).

42557323 is an equidigital number, since it uses as much as digits as its factorization.

42557323 is an evil number, because the sum of its binary digits is even.

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

The square root of 42557323 is about 6523.5973971422. The cubic root of 42557323 is about 349.1334290019.

The spelling of 42557323 in words is "forty-two million, five hundred fifty-seven thousand, three hundred twenty-three".