53297681 has 2 divisors, whose sum is σ = 53297682. Its totient is φ = 53297680.

The previous prime is 53297677. The next prime is 53297707. The reversal of 53297681 is 18679235.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 53217025 + 80656 = 7295^2 + 284^2 .

It is a cyclic number.

It is not a de Polignac number, because 53297681 - 2² = 53297677 is a prime.

It is a super-2 number, since 2×53297681² = 5681285599955522, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (53297611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26648840 + 26648841.

It is an arithmetic number, because the mean of its divisors is an integer number (26648841).

Almost surely, 2^53297681 is an apocalyptic number.

It is an amenable number.

53297681 is a deficient number, since it is larger than the sum of its proper divisors (1).

53297681 is an equidigital number, since it uses as much as digits as its factorization.

53297681 is an evil number, because the sum of its binary digits is even.

The product of its digits is 90720, while the sum is 41.

The square root of 53297681 is about 7300.5260769345. The cubic root of 53297681 is about 376.3305175303.

The spelling of 53297681 in words is "fifty-three million, two hundred ninety-seven thousand, six hundred eighty-one".