52109581 has 2 divisors, whose sum is σ = 52109582. Its totient is φ = 52109580.

The previous prime is 52109537. The next prime is 52109587. The reversal of 52109581 is 18590125.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 49829481 + 2280100 = 7059^2 + 1510^2 .

It is a cyclic number.

It is not a de Polignac number, because 52109581 - 2⁹ = 52109069 is a prime.

It is a super-2 number, since 2×52109581² = 5430816863991122, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (52109587) 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, 26054790 + 26054791.

It is an arithmetic number, because the mean of its divisors is an integer number (26054791).

Almost surely, 2^52109581 is an apocalyptic number.

It is an amenable number.

52109581 is a deficient number, since it is larger than the sum of its proper divisors (1).

52109581 is an equidigital number, since it uses as much as digits as its factorization.

52109581 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3600, while the sum is 31.

The square root of 52109581 is about 7218.6966275083. The cubic root of 52109581 is about 373.5131191006.

The spelling of 52109581 in words is "fifty-two million, one hundred nine thousand, five hundred eighty-one".