80311209 has 16 divisors (see below), whose sum is σ = 117787584. Its totient is φ = 48671040.

The previous prime is 80311177. The next prime is 80311211. The reversal of 80311209 is 90211308.

It is not a de Polignac number, because 80311209 - 2⁵ = 80311177 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (80311219) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6064 + ... + 14049.

It is an arithmetic number, because the mean of its divisors is an integer number (7361724).

Almost surely, 2^80311209 is an apocalyptic number.

It is an amenable number.

80311209 is a deficient number, since it is larger than the sum of its proper divisors (37476375).

80311209 is a wasteful number, since it uses less digits than its factorization.

80311209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20149 (or 20127 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 24.

The square root of 80311209 is about 8961.6521356277. The cubic root of 80311209 is about 431.4449479447. Note that the first 3 decimals are identical.

Subtracting 80311209 from its reverse (90211308), we obtain a palindrome (9900099).

The spelling of 80311209 in words is "eighty million, three hundred eleven thousand, two hundred nine".