53347681 has 2 divisors, whose sum is σ = 53347682. Its totient is φ = 53347680.

The previous prime is 53347631. The next prime is 53347691. The reversal of 53347681 is 18674335.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 52998400 + 349281 = 7280^2 + 591^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-53347681 is a prime.

It is a super-2 number, since 2×53347681² = 5691950136155522, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 53347681.

It is not a weakly prime, because it can be changed into another prime (53347631) 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, 26673840 + 26673841.

It is an arithmetic number, because the mean of its divisors is an integer number (26673841).

Almost surely, 2^53347681 is an apocalyptic number.

It is an amenable number.

53347681 is a deficient number, since it is larger than the sum of its proper divisors (1).

53347681 is an equidigital number, since it uses as much as digits as its factorization.

53347681 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 60480, while the sum is 37.

The square root of 53347681 is about 7303.9496849307. The cubic root of 53347681 is about 376.4481627042.

The spelling of 53347681 in words is "fifty-three million, three hundred forty-seven thousand, six hundred eighty-one".