816002111 has 4 divisors (see below), whose sum is σ = 818626224. Its totient is φ = 813378000.

The previous prime is 816002093. The next prime is 816002147. The reversal of 816002111 is 111200618.

816002111 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 111200618 = 2 ⋅55600309.

It is a cyclic number.

It is not a de Polignac number, because 816002111 - 2¹⁴ = 815985727 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (816002311) 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, 1311590 + ... + 1312211.

It is an arithmetic number, because the mean of its divisors is an integer number (204656556).

Almost surely, 2^816002111 is an apocalyptic number.

816002111 is a deficient number, since it is larger than the sum of its proper divisors (2624113).

816002111 is a wasteful number, since it uses less digits than its factorization.

816002111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2624112.

The product of its (nonzero) digits is 96, while the sum is 20.

The square root of 816002111 is about 28565.7506640382. The cubic root of 816002111 is about 934.4665514944.

Adding to 816002111 its reverse (111200618), we get a palindrome (927202729).

The spelling of 816002111 in words is "eight hundred sixteen million, two thousand, one hundred eleven".