15516161 has 2 divisors, whose sum is σ = 15516162. Its totient is φ = 15516160.

The previous prime is 15516071. The next prime is 15516167. The reversal of 15516161 is 16161551.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11833600 + 3682561 = 3440^2 + 1919^2 .

It is a cyclic number.

It is not a de Polignac number, because 15516161 - 2¹⁴ = 15499777 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 15516161.

It is not a weakly prime, because it can be changed into another prime (15516167) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7758080 + 7758081.

It is an arithmetic number, because the mean of its divisors is an integer number (7758081).

Almost surely, 2^15516161 is an apocalyptic number.

It is an amenable number.

15516161 is a deficient number, since it is larger than the sum of its proper divisors (1).

15516161 is an equidigital number, since it uses as much as digits as its factorization.

15516161 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 900, while the sum is 26.

The square root of 15516161 is about 3939.0558513431. The cubic root of 15516161 is about 249.4181722899.

The spelling of 15516161 in words is "fifteen million, five hundred sixteen thousand, one hundred sixty-one".