1311031219 has 2 divisors, whose sum is σ = 1311031220. Its totient is φ = 1311031218.

The previous prime is 1311031213. The next prime is 1311031223. The reversal of 1311031219 is 9121301131.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1311031219 - 2⁵ = 1311031187 is a prime.

It is a super-2 number, since 2×1311031219² = 3437605714385251922, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1311031219.

It is not a weakly prime, because it can be changed into another prime (1311031213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 655515609 + 655515610.

It is an arithmetic number, because the mean of its divisors is an integer number (655515610).

Almost surely, 2^1311031219 is an apocalyptic number.

1311031219 is a deficient number, since it is larger than the sum of its proper divisors (1).

1311031219 is an equidigital number, since it uses as much as digits as its factorization.

1311031219 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 162, while the sum is 22.

The square root of 1311031219 is about 36208.1650874495. The cubic root of 1311031219 is about 1094.4712163694.

The spelling of 1311031219 in words is "one billion, three hundred eleven million, thirty-one thousand, two hundred nineteen".