2267540721 has 12 divisors (see below), whose sum is σ = 3417742848. Its totient is φ = 1445967864.

The previous prime is 2267540689. The next prime is 2267540741. The reversal of 2267540721 is 1270457622.

It is a happy number.

2267540721 is a `hidden beast` number, since 226 + 7 + 5 + 407 + 21 = 666.

It is not a de Polignac number, because 2267540721 - 2⁵ = 2267540689 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (2267540741) 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, 5476945 + ... + 5477358.

It is an arithmetic number, because the mean of its divisors is an integer number (284811904).

Almost surely, 2^2267540721 is an apocalyptic number.

It is an amenable number.

2267540721 is a deficient number, since it is larger than the sum of its proper divisors (1150202127).

2267540721 is a wasteful number, since it uses less digits than its factorization.

2267540721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10954332 (or 10954329 counting only the distinct ones).

The product of its (nonzero) digits is 47040, while the sum is 36.

The square root of 2267540721 is about 47618.7013787650. The cubic root of 2267540721 is about 1313.7670489787.

The spelling of 2267540721 in words is "two billion, two hundred sixty-seven million, five hundred forty thousand, seven hundred twenty-one".