561535271 has 16 divisors (see below), whose sum is σ = 659847168. Its totient is φ = 472533600.

The previous prime is 561535267. The next prime is 561535283. The reversal of 561535271 is 172535165.

It is not a de Polignac number, because 561535271 - 2² = 561535267 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561535171) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27956 + ... + 43641.

It is an arithmetic number, because the mean of its divisors is an integer number (41240448).

Almost surely, 2^561535271 is an apocalyptic number.

561535271 is a deficient number, since it is larger than the sum of its proper divisors (98311897).

561535271 is a wasteful number, since it uses less digits than its factorization.

561535271 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71662.

The product of its digits is 31500, while the sum is 35.

The square root of 561535271 is about 23696.7354502682. The cubic root of 561535271 is about 825.0096214366.

The spelling of 561535271 in words is "five hundred sixty-one million, five hundred thirty-five thousand, two hundred seventy-one".