2263742721 has 10 divisors (see below), whose sum is σ = 3381640482. Its totient is φ = 1509161760.

The previous prime is 2263742699. The next prime is 2263742737. The reversal of 2263742721 is 1272473622.

It is a happy number.

2263742721 is a `hidden beast` number, since 226 + 3 + 7 + 427 + 2 + 1 = 666.

2263742721 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 2241075600 + 22667121 = 47340^2 + 4761^2 .

It is not a de Polignac number, because 2263742721 - 2⁹ = 2263742209 is a prime.

It is a super-2 number, since 2×2263742721² = 10249062213760967682, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2263742521) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 13973640 + ... + 13973801.

Almost surely, 2^2263742721 is an apocalyptic number.

It is an amenable number.

2263742721 is a deficient number, since it is larger than the sum of its proper divisors (1117897761).

2263742721 is an equidigital number, since it uses as much as digits as its factorization.

2263742721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27947453 (or 27947444 counting only the distinct ones).

The product of its digits is 56448, while the sum is 36.

The square root of 2263742721 is about 47578.8053759234. The cubic root of 2263742721 is about 1313.0331443842.

The spelling of 2263742721 in words is "two billion, two hundred sixty-three million, seven hundred forty-two thousand, seven hundred twenty-one".