2221828731 has 8 divisors (see below), whose sum is σ = 3291598160. Its totient is φ = 1481219136.

The previous prime is 2221828711. The next prime is 2221828733. The reversal of 2221828731 is 1378281222.

It is not a de Polignac number, because 2221828731 - 2¹⁹ = 2221304443 is a prime.

It is a super-2 number, since 2×2221828731² = 9873045819794140722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2221828733) 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 7 ways as a sum of consecutive naturals, for example, 41144950 + ... + 41145003.

It is an arithmetic number, because the mean of its divisors is an integer number (411449770).

Almost surely, 2^2221828731 is an apocalyptic number.

2221828731 is a deficient number, since it is larger than the sum of its proper divisors (1069769429).

2221828731 is an equidigital number, since it uses as much as digits as its factorization.

2221828731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82289962 (or 82289956 counting only the distinct ones).

The product of its digits is 21504, while the sum is 36.

The square root of 2221828731 is about 47136.2782896571. The cubic root of 2221828731 is about 1304.8788525403.

The spelling of 2221828731 in words is "two billion, two hundred twenty-one million, eight hundred twenty-eight thousand, seven hundred thirty-one".