42519523 has 2 divisors, whose sum is σ = 42519524. Its totient is φ = 42519522.

The previous prime is 42519517. The next prime is 42519541. The reversal of 42519523 is 32591524.

42519523 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42519523 - 2²⁵ = 8965091 is a prime.

It is a super-2 number, since 2×42519523² = 3615819672295058, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (42519563) 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 as a sum of consecutive naturals, namely, 21259761 + 21259762.

It is an arithmetic number, because the mean of its divisors is an integer number (21259762).

Almost surely, 2^42519523 is an apocalyptic number.

42519523 is a deficient number, since it is larger than the sum of its proper divisors (1).

42519523 is an equidigital number, since it uses as much as digits as its factorization.

42519523 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10800, while the sum is 31.

The square root of 42519523 is about 6520.6995790329. The cubic root of 42519523 is about 349.0300300101.

The spelling of 42519523 in words is "forty-two million, five hundred nineteen thousand, five hundred twenty-three".