2273721900 has 36 divisors (see below), whose sum is σ = 6578636232. Its totient is φ = 606325760.

The previous prime is 2273721883. The next prime is 2273721907. The reversal of 2273721900 is 91273722.

It is a super-2 number, since 2×2273721900² = 10339622557079220000, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2273721907) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3789237 + ... + 3789836.

Almost surely, 2^2273721900 is an apocalyptic number.

2273721900 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2273721900 is an abundant number, since it is smaller than the sum of its proper divisors (4304914332).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2273721900 is a wasteful number, since it uses less digits than its factorization.

2273721900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7579090 (or 7579083 counting only the distinct ones).

The product of its (nonzero) digits is 10584, while the sum is 33.

The square root of 2273721900 is about 47683.5600600459. The cubic root of 2273721900 is about 1314.9597157875.

The spelling of 2273721900 in words is "two billion, two hundred seventy-three million, seven hundred twenty-one thousand, nine hundred".