10165681 has 2 divisors, whose sum is σ = 10165682. Its totient is φ = 10165680.

The previous prime is 10165637. The next prime is 10165693. The reversal of 10165681 is 18656101.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5688225 + 4477456 = 2385^2 + 2116^2 .

It is a cyclic number.

It is not a de Polignac number, because 10165681 - 2¹¹ = 10163633 is a prime.

It is a super-2 number, since 2×10165681² = 206682140387522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (10165381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5082840 + 5082841.

It is an arithmetic number, because the mean of its divisors is an integer number (5082841).

Almost surely, 2^10165681 is an apocalyptic number.

10165681 is the 2017-th centered pentagonal number.

It is an amenable number.

10165681 is a deficient number, since it is larger than the sum of its proper divisors (1).

10165681 is an equidigital number, since it uses as much as digits as its factorization.

10165681 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1440, while the sum is 28.

The square root of 10165681 is about 3188.3665096723. The cubic root of 10165681 is about 216.6267874006.

The spelling of 10165681 in words is "ten million, one hundred sixty-five thousand, six hundred eighty-one".