565231261 has 8 divisors (see below), whose sum is σ = 646462080. Its totient is φ = 484121328.

The previous prime is 565231241. The next prime is 565231297. The reversal of 565231261 is 162132565.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 565231261 - 2¹¹ = 565229213 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 (565231201) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19966 + ... + 39103.

It is an arithmetic number, because the mean of its divisors is an integer number (80807760).

Almost surely, 2^565231261 is an apocalyptic number.

It is an amenable number.

565231261 is a deficient number, since it is larger than the sum of its proper divisors (81230819).

565231261 is a wasteful number, since it uses less digits than its factorization.

565231261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60443.

The product of its digits is 10800, while the sum is 31.

The square root of 565231261 is about 23774.5927620222. The cubic root of 565231261 is about 826.8157185675.

The spelling of 565231261 in words is "five hundred sixty-five million, two hundred thirty-one thousand, two hundred sixty-one".