561747271 has 4 divisors (see below), whose sum is σ = 567201232. Its totient is φ = 556293312.

The previous prime is 561747253. The next prime is 561747301. The reversal of 561747271 is 172747165.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 172747165 = 5 ⋅34549433.

It is a cyclic number.

It is not a de Polignac number, because 561747271 - 2⁷ = 561747143 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 (561747211) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2726826 + ... + 2727031.

It is an arithmetic number, because the mean of its divisors is an integer number (141800308).

Almost surely, 2^561747271 is an apocalyptic number.

561747271 is a deficient number, since it is larger than the sum of its proper divisors (5453961).

561747271 is a wasteful number, since it uses less digits than its factorization.

561747271 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5453960.

The product of its digits is 82320, while the sum is 40.

The square root of 561747271 is about 23701.2082181479. The cubic root of 561747271 is about 825.1134320921.

The spelling of 561747271 in words is "five hundred sixty-one million, seven hundred forty-seven thousand, two hundred seventy-one".