52567681 has 2 divisors, whose sum is σ = 52567682. Its totient is φ = 52567680.

The previous prime is 52567601. The next prime is 52567687. The reversal of 52567681 is 18676525.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 52070656 + 497025 = 7216^2 + 705^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-52567681 is a prime.

It is a super-2 number, since 2×52567681² = 5526722171435522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (52567687) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26283840 + 26283841.

It is an arithmetic number, because the mean of its divisors is an integer number (26283841).

Almost surely, 2^52567681 is an apocalyptic number.

It is an amenable number.

52567681 is a deficient number, since it is larger than the sum of its proper divisors (1).

52567681 is an equidigital number, since it uses as much as digits as its factorization.

52567681 is an evil number, because the sum of its binary digits is even.

The product of its digits is 100800, while the sum is 40.

The square root of 52567681 is about 7250.3573015404. The cubic root of 52567681 is about 374.6044564156.

The spelling of 52567681 in words is "fifty-two million, five hundred sixty-seven thousand, six hundred eighty-one".