563251261 has 4 divisors (see below), whose sum is σ = 564761692.
Its totient is φ = 561740832.
The previous prime is 563251237. The next prime is 563251267. The reversal of 563251261 is 162152365.
It is a semiprime because it is the product of two primes.
It can be written as a sum of positive squares in 2 ways, for example, as 452370361 + 110880900 = 21269^2 + 10530^2
It is a cyclic number.
It is not a de Polignac number, because 563251261 - 215 = 563218493 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 (563251267) 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, 754656 + ... + 755401.
It is an arithmetic number, because the mean of its divisors is an integer number (141190423).
Almost surely, 2563251261 is an apocalyptic number.
It is an amenable number.
563251261 is a deficient number, since it is larger than the sum of its proper divisors (1510431).
563251261 is a wasteful number, since it uses less digits than its factorization.
563251261 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 1510430.
The product of its digits is 10800, while the sum is 31.
The square root of 563251261 is about 23732.9151391059.
The cubic root of 563251261 is about 825.8491463924.
The spelling of 563251261 in words is "five hundred sixty-three million, two hundred fifty-one thousand, two hundred sixty-one".