15049681 has 2 divisors, whose sum is σ = 15049682. Its totient is φ = 15049680.

The previous prime is 15049631. The next prime is 15049693. The reversal of 15049681 is 18694051.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14318656 + 731025 = 3784^2 + 855^2 .

It is an emirp because it is prime and its reverse (18694051) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 15049681 - 2¹¹ = 15047633 is a prime.

It is a super-2 number, since 2×15049681² = 452985796403522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (15049621) 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, 7524840 + 7524841.

It is an arithmetic number, because the mean of its divisors is an integer number (7524841).

Almost surely, 2^15049681 is an apocalyptic number.

It is an amenable number.

15049681 is a deficient number, since it is larger than the sum of its proper divisors (1).

15049681 is an equidigital number, since it uses as much as digits as its factorization.

15049681 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8640, while the sum is 34.

The square root of 15049681 is about 3879.3918337801. The cubic root of 15049681 is about 246.8931826804.

The spelling of 15049681 in words is "fifteen million, forty-nine thousand, six hundred eighty-one".