53018681 has 2 divisors, whose sum is σ = 53018682. Its totient is φ = 53018680.

The previous prime is 53018653. The next prime is 53018687. The reversal of 53018681 is 18681035.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 46022656 + 6996025 = 6784^2 + 2645^2 .

It is a cyclic number.

It is not a de Polignac number, because 53018681 - 2¹⁴ = 53002297 is a prime.

It is a super-2 number, since 2×53018681² = 5621961069959522, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (53018687) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26509340 + 26509341.

It is an arithmetic number, because the mean of its divisors is an integer number (26509341).

Almost surely, 2^53018681 is an apocalyptic number.

It is an amenable number.

53018681 is a deficient number, since it is larger than the sum of its proper divisors (1).

53018681 is an equidigital number, since it uses as much as digits as its factorization.

53018681 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5760, while the sum is 32.

The square root of 53018681 is about 7281.3927925913. The cubic root of 53018681 is about 375.6727030519.

The spelling of 53018681 in words is "fifty-three million, eighteen thousand, six hundred eighty-one".