1331311199 has 4 divisors (see below), whose sum is σ = 1344492600. Its totient is φ = 1318129800.

The previous prime is 1331311193. The next prime is 1331311243. The reversal of 1331311199 is 9911131331.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9911131331 = 839 ⋅11813029.

It is a cyclic number.

It is not a de Polignac number, because 1331311199 - 2⁴ = 1331311183 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 (1331311193) 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, 6590549 + ... + 6590750.

It is an arithmetic number, because the mean of its divisors is an integer number (336123150).

Almost surely, 2^1331311199 is an apocalyptic number.

1331311199 is a deficient number, since it is larger than the sum of its proper divisors (13181401).

1331311199 is a wasteful number, since it uses less digits than its factorization.

1331311199 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13181400.

The product of its digits is 2187, while the sum is 32.

The square root of 1331311199 is about 36487.1374459548. The cubic root of 1331311199 is about 1100.0857230715.

The spelling of 1331311199 in words is "one billion, three hundred thirty-one million, three hundred eleven thousand, one hundred ninety-nine".