42536519 has 2 divisors, whose sum is σ = 42536520. Its totient is φ = 42536518.

The previous prime is 42536509. The next prime is 42536531. The reversal of 42536519 is 91563524.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42536519 - 2¹⁶ = 42470983 is a prime.

It is a super-2 number, since 2×42536519² = 3618710897274722, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42536509) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21268259 + 21268260.

It is an arithmetic number, because the mean of its divisors is an integer number (21268260).

Almost surely, 2^42536519 is an apocalyptic number.

42536519 is a deficient number, since it is larger than the sum of its proper divisors (1).

42536519 is an equidigital number, since it uses as much as digits as its factorization.

42536519 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 32400, while the sum is 35.

The square root of 42536519 is about 6522.0026832255. The cubic root of 42536519 is about 349.0765288397.

Subtracting from 42536519 its sum of digits (35), we obtain a square (42536484 = 6522²).

The spelling of 42536519 in words is "forty-two million, five hundred thirty-six thousand, five hundred nineteen".