2272731481 has 4 divisors (see below), whose sum is σ = 2300113872. Its totient is φ = 2245349092.

The previous prime is 2272731469. The next prime is 2272731511. The reversal of 2272731481 is 1841372722.

2272731481 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2272731481 - 2⁷ = 2272731353 is a prime.

It is a super-2 number, since 2×2272731481² = 10330616769456906722, which contains 22 as substring.

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 2272731481.

It is not an unprimeable number, because it can be changed into a prime (2272731431) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13691071 + ... + 13691236.

It is an arithmetic number, because the mean of its divisors is an integer number (575028468).

Almost surely, 2^2272731481 is an apocalyptic number.

It is an amenable number.

2272731481 is a deficient number, since it is larger than the sum of its proper divisors (27382391).

2272731481 is an equidigital number, since it uses as much as digits as its factorization.

2272731481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27382390.

The product of its digits is 37632, while the sum is 37.

The square root of 2272731481 is about 47673.1735989959. The cubic root of 2272731481 is about 1314.7687586565.

The spelling of 2272731481 in words is "two billion, two hundred seventy-two million, seven hundred thirty-one thousand, four hundred eighty-one".