42575551 has 2 divisors, whose sum is σ = 42575552. Its totient is φ = 42575550.

The previous prime is 42575543. The next prime is 42575573. The reversal of 42575551 is 15557524.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42575551 - 2³ = 42575543 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42575501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21287775 + 21287776.

It is an arithmetic number, because the mean of its divisors is an integer number (21287776).

Almost surely, 2^42575551 is an apocalyptic number.

42575551 is a deficient number, since it is larger than the sum of its proper divisors (1).

42575551 is an equidigital number, since it uses as much as digits as its factorization.

42575551 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 35000, while the sum is 34.

The square root of 42575551 is about 6524.9943294995. The cubic root of 42575551 is about 349.1832684130.

The spelling of 42575551 in words is "forty-two million, five hundred seventy-five thousand, five hundred fifty-one".