8131219 has 8 divisors (see below), whose sum is σ = 8700048. Its totient is φ = 7572480.

The previous prime is 8131177. The next prime is 8131229. The reversal of 8131219 is 9121318.

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

It is not a de Polignac number, because 8131219 - 2⁷ = 8131091 is a prime.

It is a super-2 number, since 2×8131219² = 132233444851922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 8131193 and 8131202.

It is not an unprimeable number, because it can be changed into a prime (8131229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 817 + ... + 4114.

It is an arithmetic number, because the mean of its divisors is an integer number (1087506).

Almost surely, 2^8131219 is an apocalyptic number.

8131219 is a deficient number, since it is larger than the sum of its proper divisors (568829).

8131219 is a wasteful number, since it uses less digits than its factorization.

8131219 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5045.

The product of its digits is 432, while the sum is 25.

The square root of 8131219 is about 2851.5292388471. The cubic root of 8131219 is about 201.0875669376.

Subtracting 8131219 from its reverse (9121318), we obtain a palindrome (990099).

The spelling of 8131219 in words is "eight million, one hundred thirty-one thousand, two hundred nineteen".