53416681 has 2 divisors, whose sum is σ = 53416682. Its totient is φ = 53416680.

The previous prime is 53416673. The next prime is 53416697. The reversal of 53416681 is 18661435.

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., 51768025 + 1648656 = 7195^2 + 1284^2 .

It is a cyclic number.

It is not a de Polignac number, because 53416681 - 2³ = 53416673 is a prime.

It is a super-2 number, since 2×53416681² = 5706683618111522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (53416631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26708340 + 26708341.

It is an arithmetic number, because the mean of its divisors is an integer number (26708341).

Almost surely, 2^53416681 is an apocalyptic number.

It is an amenable number.

53416681 is a deficient number, since it is larger than the sum of its proper divisors (1).

53416681 is an equidigital number, since it uses as much as digits as its factorization.

53416681 is an evil number, because the sum of its binary digits is even.

The product of its digits is 17280, while the sum is 34.

The square root of 53416681 is about 7308.6716303306. The cubic root of 53416681 is about 376.6103923901.

The spelling of 53416681 in words is "fifty-three million, four hundred sixteen thousand, six hundred eighty-one".