11681219 has 12 divisors (see below), whose sum is σ = 13518120. Its totient is φ = 10058400.

The previous prime is 11681213. The next prime is 11681221. The reversal of 11681219 is 91218611.

It is a de Polignac number, because none of the positive numbers 2^k-11681219 is a prime.

It is a super-2 number, since 2×11681219² = 272901754651922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 11681191 and 11681200.

It is not an unprimeable number, because it can be changed into a prime (11681213) 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 11 ways as a sum of consecutive naturals, for example, 242 + ... + 4839.

It is an arithmetic number, because the mean of its divisors is an integer number (1126510).

Almost surely, 2^11681219 is an apocalyptic number.

11681219 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

11681219 is a deficient number, since it is larger than the sum of its proper divisors (1836901).

11681219 is a wasteful number, since it uses less digits than its factorization.

11681219 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5122 (or 5111 counting only the distinct ones).

The product of its digits is 864, while the sum is 29.

The square root of 11681219 is about 3417.7798349221. The cubic root of 11681219 is about 226.8973317473.

The spelling of 11681219 in words is "eleven million, six hundred eighty-one thousand, two hundred nineteen".