2273849781 has 8 divisors (see below), whose sum is σ = 3464913984. Its totient is φ = 1299342720.

The previous prime is 2273849741. The next prime is 2273849803. The reversal of 2273849781 is 1879483722.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2273849781 - 2⁹ = 2273849269 is a prime.

It is a super-2 number, since 2×2273849781² = 10340785653107495922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2273849741) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 54139260 + ... + 54139301.

It is an arithmetic number, because the mean of its divisors is an integer number (433114248).

Almost surely, 2^2273849781 is an apocalyptic number.

2273849781 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2273849781 is a deficient number, since it is larger than the sum of its proper divisors (1191064203).

2273849781 is a wasteful number, since it uses less digits than its factorization.

2273849781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108278571.

The product of its digits is 1354752, while the sum is 51.

The square root of 2273849781 is about 47684.9009750466. The cubic root of 2273849781 is about 1314.9843677632.

The spelling of 2273849781 in words is "two billion, two hundred seventy-three million, eight hundred forty-nine thousand, seven hundred eighty-one".