10115681 has 2 divisors, whose sum is σ = 10115682. Its totient is φ = 10115680.

The previous prime is 10115659. The next prime is 10115701. The reversal of 10115681 is 18651101.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7376656 + 2739025 = 2716^2 + 1655^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10115681 is a prime.

It is a super-2 number, since 2×10115681² = 204654004187522, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (10115381) 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, 5057840 + 5057841.

It is an arithmetic number, because the mean of its divisors is an integer number (5057841).

Almost surely, 2^10115681 is an apocalyptic number.

It is an amenable number.

10115681 is a deficient number, since it is larger than the sum of its proper divisors (1).

10115681 is an equidigital number, since it uses as much as digits as its factorization.

10115681 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 240, while the sum is 23.

The square root of 10115681 is about 3180.5158386652. The cubic root of 10115681 is about 216.2710432038.

Adding to 10115681 its reverse (18651101), we get a palindrome (28766782).

The spelling of 10115681 in words is "ten million, one hundred fifteen thousand, six hundred eighty-one".