53564681 has 2 divisors, whose sum is σ = 53564682. Its totient is φ = 53564680.

The previous prime is 53564669. The next prime is 53564689. The reversal of 53564681 is 18646535.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 47389456 + 6175225 = 6884^2 + 2485^2 .

It is a cyclic number.

It is not a de Polignac number, because 53564681 - 2⁶ = 53564617 is a prime.

It is a super-2 number, since 2×53564681² = 5738350101263522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (53564689) 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, 26782340 + 26782341.

It is an arithmetic number, because the mean of its divisors is an integer number (26782341).

Almost surely, 2^53564681 is an apocalyptic number.

It is an amenable number.

53564681 is a deficient number, since it is larger than the sum of its proper divisors (1).

53564681 is an equidigital number, since it uses as much as digits as its factorization.

53564681 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 86400, while the sum is 38.

The square root of 53564681 is about 7318.7895857170. The cubic root of 53564681 is about 376.9578927003.

It can be divided in two parts, 53564 and 681, that added together give a palindrome (54245).

The spelling of 53564681 in words is "fifty-three million, five hundred sixty-four thousand, six hundred eighty-one".