15828481 has 2 divisors, whose sum is σ = 15828482. Its totient is φ = 15828480.

The previous prime is 15828469. The next prime is 15828487. The reversal of 15828481 is 18482851.

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., 14288400 + 1540081 = 3780^2 + 1241^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-15828481 is a prime.

It is a super-2 number, since 2×15828481² = 501081621534722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 15828481.

It is not a weakly prime, because it can be changed into another prime (15828487) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7914240 + 7914241.

It is an arithmetic number, because the mean of its divisors is an integer number (7914241).

Almost surely, 2^15828481 is an apocalyptic number.

It is an amenable number.

15828481 is a deficient number, since it is larger than the sum of its proper divisors (1).

15828481 is an equidigital number, since it uses as much as digits as its factorization.

15828481 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20480, while the sum is 37.

The square root of 15828481 is about 3978.5023564150. The cubic root of 15828481 is about 251.0805548758.

The spelling of 15828481 in words is "fifteen million, eight hundred twenty-eight thousand, four hundred eighty-one".