2809996231 has 4 divisors (see below), whose sum is σ = 3211424272. Its totient is φ = 2408568192.

The previous prime is 2809996223. The next prime is 2809996247. The reversal of 2809996231 is 1326999082.

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

It is a cyclic number.

It is not a de Polignac number, because 2809996231 - 2³ = 2809996223 is a prime.

It is a super-2 number, since 2×2809996231² = 15792157636468410722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2809996831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 200714010 + ... + 200714023.

It is an arithmetic number, because the mean of its divisors is an integer number (802856068).

Almost surely, 2^2809996231 is an apocalyptic number.

2809996231 is a deficient number, since it is larger than the sum of its proper divisors (401428041).

2809996231 is an equidigital number, since it uses as much as digits as its factorization.

2809996231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 401428040.

The product of its (nonzero) digits is 419904, while the sum is 49.

The square root of 2809996231 is about 53009.3975725060. The cubic root of 2809996231 is about 1411.1350501926.

The spelling of 2809996231 in words is "two billion, eight hundred nine million, nine hundred ninety-six thousand, two hundred thirty-one".