561172259 has 2 divisors, whose sum is σ = 561172260. Its totient is φ = 561172258.

The previous prime is 561172237. The next prime is 561172291. The reversal of 561172259 is 952271165.

It is a happy number.

561172259 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 561172259 - 2²⁴ = 544395043 is a prime.

It is not a weakly prime, because it can be changed into another prime (561172459) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 280586129 + 280586130.

It is an arithmetic number, because the mean of its divisors is an integer number (280586130).

Almost surely, 2^561172259 is an apocalyptic number.

561172259 is a deficient number, since it is larger than the sum of its proper divisors (1).

561172259 is an equidigital number, since it uses as much as digits as its factorization.

561172259 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 37800, while the sum is 38.

The square root of 561172259 is about 23689.0746758923. The cubic root of 561172259 is about 824.8318036055.

The spelling of 561172259 in words is "five hundred sixty-one million, one hundred seventy-two thousand, two hundred fifty-nine".