52805681 has 2 divisors, whose sum is σ = 52805682. Its totient is φ = 52805680.

The previous prime is 52805671. The next prime is 52805713. The reversal of 52805681 is 18650825.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 51265600 + 1540081 = 7160^2 + 1241^2 .

It is a cyclic number.

It is not a de Polignac number, because 52805681 - 2¹⁸ = 52543537 is a prime.

It is a super-2 number, since 2×52805681² = 5576879891747522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (52805651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26402840 + 26402841.

It is an arithmetic number, because the mean of its divisors is an integer number (26402841).

Almost surely, 2^52805681 is an apocalyptic number.

It is an amenable number.

52805681 is a deficient number, since it is larger than the sum of its proper divisors (1).

52805681 is an equidigital number, since it uses as much as digits as its factorization.

52805681 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 19200, while the sum is 35.

The square root of 52805681 is about 7266.7517502664. The cubic root of 52805681 is about 375.1689455046.

The spelling of 52805681 in words is "fifty-two million, eight hundred five thousand, six hundred eighty-one".