42216589 has 2 divisors, whose sum is σ = 42216590. Its totient is φ = 42216588.

The previous prime is 42216541. The next prime is 42216599. The reversal of 42216589 is 98561224.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 26677225 + 15539364 = 5165^2 + 3942^2 .

It is a cyclic number.

It is not a de Polignac number, because 42216589 - 2¹⁷ = 42085517 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42216599) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21108294 + 21108295.

It is an arithmetic number, because the mean of its divisors is an integer number (21108295).

Almost surely, 2^42216589 is an apocalyptic number.

It is an amenable number.

42216589 is a deficient number, since it is larger than the sum of its proper divisors (1).

42216589 is an equidigital number, since it uses as much as digits as its factorization.

42216589 is an evil number, because the sum of its binary digits is even.

The product of its digits is 34560, while the sum is 37.

The square root of 42216589 is about 6497.4294147763. The cubic root of 42216589 is about 348.1991555028.

The spelling of 42216589 in words is "forty-two million, two hundred sixteen thousand, five hundred eighty-nine".