1320217159 has 4 divisors (see below), whose sum is σ = 1321184304. Its totient is φ = 1319250016.

The previous prime is 1320217139. The next prime is 1320217177. The reversal of 1320217159 is 9517120231.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1320217159 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1320217159.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1320217139) 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, 481522 + ... + 484255.

It is an arithmetic number, because the mean of its divisors is an integer number (330296076).

Almost surely, 2^1320217159 is an apocalyptic number.

1320217159 is a deficient number, since it is larger than the sum of its proper divisors (967145).

1320217159 is an equidigital number, since it uses as much as digits as its factorization.

1320217159 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 967144.

The product of its (nonzero) digits is 3780, while the sum is 31.

The square root of 1320217159 is about 36334.7926786434. The cubic root of 1320217159 is about 1097.0214624964.

The spelling of 1320217159 in words is "one billion, three hundred twenty million, two hundred seventeen thousand, one hundred fifty-nine".