52561517 has 2 divisors, whose sum is σ = 52561518.
Its totient is φ = 52561516.
The previous prime is 52561499. The next prime is 52561519. The reversal of 52561517 is 71516525.
It is a strong prime.
It can be written as a sum of positive squares in only one way, i.e., 36409156 + 16152361 = 6034^2 + 4019^2
It is a cyclic number.
It is not a de Polignac number, because 52561517 - 210 = 52560493 is a prime.
Together with 52561519, it forms a pair of twin primes.
It is a Chen prime.
It is a congruent number.
It is not a weakly prime, because it can be changed into another prime (52561519) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (11) of ones.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26280758 + 26280759.
It is an arithmetic number, because the mean of its divisors is an integer number (26280759).
Almost surely, 252561517 is an apocalyptic number.
It is an amenable number.
52561517 is a deficient number, since it is larger than the sum of its proper divisors (1).
52561517 is an equidigital number, since it uses as much as digits as its factorization.
52561517 is an odious number, because the sum of its binary digits is odd.
The product of its digits is 10500, while the sum is 32.
The square root of 52561517 is about 7249.9322065796.
The cubic root of 52561517 is about 374.5898140086.
The spelling of 52561517 in words is "fifty-two million, five hundred sixty-one thousand, five hundred seventeen".