52007561 has 2 divisors, whose sum is σ = 52007562. Its totient is φ = 52007560.

The previous prime is 52007513. The next prime is 52007567. The reversal of 52007561 is 16570025.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 32035600 + 19971961 = 5660^2 + 4469^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-52007561 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 52007561.

It is not a weakly prime, because it can be changed into another prime (52007567) 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, 26003780 + 26003781.

It is an arithmetic number, because the mean of its divisors is an integer number (26003781).

Almost surely, 2^52007561 is an apocalyptic number.

It is an amenable number.

52007561 is a deficient number, since it is larger than the sum of its proper divisors (1).

52007561 is an equidigital number, since it uses as much as digits as its factorization.

52007561 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2100, while the sum is 26.

The square root of 52007561 is about 7211.6267928949. The cubic root of 52007561 is about 373.2692055209.

Adding to 52007561 its reverse (16570025), we get a palindrome (68577586).

The spelling of 52007561 in words is "fifty-two million, seven thousand, five hundred sixty-one".