15768481 has 2 divisors, whose sum is σ = 15768482. Its totient is φ = 15768480.

The previous prime is 15768451. The next prime is 15768541. The reversal of 15768481 is 18486751.

15768481 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14130081 + 1638400 = 3759^2 + 1280^2 .

It is a cyclic number.

It is not a de Polignac number, because 15768481 - 2⁵ = 15768449 is a prime.

It is a super-2 number, since 2×15768481² = 497289986094722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (15768451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7884240 + 7884241.

It is an arithmetic number, because the mean of its divisors is an integer number (7884241).

Almost surely, 2^15768481 is an apocalyptic number.

It is an amenable number.

15768481 is a deficient number, since it is larger than the sum of its proper divisors (1).

15768481 is an equidigital number, since it uses as much as digits as its factorization.

15768481 is an evil number, because the sum of its binary digits is even.

The product of its digits is 53760, while the sum is 40.

The square root of 15768481 is about 3970.9546711087. The cubic root of 15768481 is about 250.7629015567.

The spelling of 15768481 in words is "fifteen million, seven hundred sixty-eight thousand, four hundred eighty-one".