2081511229 has 18 divisors (see below), whose sum is σ = 2572178010. Its totient is φ = 1679190912.

The previous prime is 2081511193. The next prime is 2081511251. The reversal of 2081511229 is 9221151802.

It can be written as a sum of positive squares in 3 ways, for example, as 591705625 + 1489805604 = 24325^2 + 38598^2 .

It is not a de Polignac number, because 2081511229 - 2¹³ = 2081503037 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 2081511229.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2081511529) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 59334 + ... + 87655.

Almost surely, 2^2081511229 is an apocalyptic number.

It is an amenable number.

2081511229 is a deficient number, since it is larger than the sum of its proper divisors (490666781).

2081511229 is a wasteful number, since it uses less digits than its factorization.

2081511229 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147037 (or 147013 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 31.

The square root of 2081511229 is about 45623.5819396066. The cubic root of 2081511229 is about 1276.8099331874.

The spelling of 2081511229 in words is "two billion, eighty-one million, five hundred eleven thousand, two hundred twenty-nine".