42228569 has 2 divisors, whose sum is σ = 42228570. Its totient is φ = 42228568.

The previous prime is 42228551. The next prime is 42228577. The reversal of 42228569 is 96582224.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22202944 + 20025625 = 4712^2 + 4475^2 .

It is a cyclic number.

It is not a de Polignac number, because 42228569 - 2²⁴ = 25451353 is a prime.

It is a super-5 number, since 5×42228569⁵ (a number of 39 digits) contains 55555 as substring. Note that it is a super-d number also for d = 2.

It is not a weakly prime, because it can be changed into another prime (42228869) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21114284 + 21114285.

It is an arithmetic number, because the mean of its divisors is an integer number (21114285).

Almost surely, 2^42228569 is an apocalyptic number.

It is an amenable number.

42228569 is a deficient number, since it is larger than the sum of its proper divisors (1).

42228569 is an equidigital number, since it uses as much as digits as its factorization.

42228569 is an evil number, because the sum of its binary digits is even.

The product of its digits is 69120, while the sum is 38.

The square root of 42228569 is about 6498.3512524332. The cubic root of 42228569 is about 348.2320890917.

The spelling of 42228569 in words is "forty-two million, two hundred twenty-eight thousand, five hundred sixty-nine".