2160801509 has 4 divisors (see below), whose sum is σ = 2162894316. Its totient is φ = 2158708704.

The previous prime is 2160801497. The next prime is 2160801563. The reversal of 2160801509 is 9051080612.

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

It can be written as a sum of positive squares in 2 ways, for example, as 920212225 + 1240589284 = 30335^2 + 35222^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2160801509 is a prime.

It is a super-2 number, since 2×2160801509² = 9338126322593354162, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2160801569) 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, 1044854 + ... + 1046919.

It is an arithmetic number, because the mean of its divisors is an integer number (540723579).

Almost surely, 2^2160801509 is an apocalyptic number.

It is an amenable number.

2160801509 is a deficient number, since it is larger than the sum of its proper divisors (2092807).

2160801509 is a wasteful number, since it uses less digits than its factorization.

2160801509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2092806.

The product of its (nonzero) digits is 4320, while the sum is 32.

The square root of 2160801509 is about 46484.4222186315. The cubic root of 2160801509 is about 1292.8206830238.

The spelling of 2160801509 in words is "two billion, one hundred sixty million, eight hundred one thousand, five hundred nine".