42515573 has 2 divisors, whose sum is σ = 42515574. Its totient is φ = 42515572.

The previous prime is 42515563. The next prime is 42515579. The reversal of 42515573 is 37551524.

42515573 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22819729 + 19695844 = 4777^2 + 4438^2 .

It is a cyclic number.

It is not a de Polignac number, because 42515573 - 2¹⁴ = 42499189 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42515579) 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, 21257786 + 21257787.

It is an arithmetic number, because the mean of its divisors is an integer number (21257787).

Almost surely, 2^42515573 is an apocalyptic number.

It is an amenable number.

42515573 is a deficient number, since it is larger than the sum of its proper divisors (1).

42515573 is an equidigital number, since it uses as much as digits as its factorization.

42515573 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 21000, while the sum is 32.

The square root of 42515573 is about 6520.3966903863. The cubic root of 42515573 is about 349.0192215531.

The spelling of 42515573 in words is "forty-two million, five hundred fifteen thousand, five hundred seventy-three".