15556161 has 8 divisors (see below), whose sum is σ = 20769280. Its totient is φ = 10356912.

The previous prime is 15556157. The next prime is 15556183. The reversal of 15556161 is 16165551.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 15556161 - 2² = 15556157 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15556111) 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 in 7 ways as a sum of consecutive naturals, for example, 481 + ... + 5598.

It is an arithmetic number, because the mean of its divisors is an integer number (2596160).

Almost surely, 2^15556161 is an apocalyptic number.

It is an amenable number.

15556161 is a deficient number, since it is larger than the sum of its proper divisors (5213119).

15556161 is an equidigital number, since it uses as much as digits as its factorization.

15556161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6935.

The product of its digits is 4500, while the sum is 30.

The square root of 15556161 is about 3944.1299420785. The cubic root of 15556161 is about 249.6323181721.

The spelling of 15556161 in words is "fifteen million, five hundred fifty-six thousand, one hundred sixty-one".