15791081 has 4 divisors (see below), whose sum is σ = 15830100. Its totient is φ = 15752064.

The previous prime is 15791023. The next prime is 15791089. The reversal of 15791081 is 18019751.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 18019751 = 179 ⋅100669.

It can be written as a sum of positive squares in 2 ways, for example, as 9954025 + 5837056 = 3155^2 + 2416^2 .

It is a cyclic number.

It is not a de Polignac number, because 15791081 - 2¹⁰ = 15790057 is a prime.

It is a super-2 number, since 2×15791081² = 498716478297122, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (15791089) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18896 + ... + 19713.

It is an arithmetic number, because the mean of its divisors is an integer number (3957525).

Almost surely, 2^15791081 is an apocalyptic number.

It is an amenable number.

15791081 is a deficient number, since it is larger than the sum of its proper divisors (39019).

15791081 is an equidigital number, since it uses as much as digits as its factorization.

15791081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39018.

The product of its (nonzero) digits is 2520, while the sum is 32.

The square root of 15791081 is about 3973.7993155166. The cubic root of 15791081 is about 250.8826454142.

The spelling of 15791081 in words is "fifteen million, seven hundred ninety-one thousand, eighty-one".