2267205721 has 4 divisors (see below), whose sum is σ = 2473315344. Its totient is φ = 2061096100.

The previous prime is 2267205719. The next prime is 2267205769. The reversal of 2267205721 is 1275027622.

It is a happy number.

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 2267205721 - 2¹ = 2267205719 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2267205701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 103054795 + ... + 103054816.

It is an arithmetic number, because the mean of its divisors is an integer number (618328836).

Almost surely, 2^2267205721 is an apocalyptic number.

It is an amenable number.

2267205721 is a deficient number, since it is larger than the sum of its proper divisors (206109623).

2267205721 is a wasteful number, since it uses less digits than its factorization.

2267205721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 206109622.

The product of its (nonzero) digits is 23520, while the sum is 34.

The square root of 2267205721 is about 47615.1837232621. The cubic root of 2267205721 is about 1313.7023483932.

The spelling of 2267205721 in words is "two billion, two hundred sixty-seven million, two hundred five thousand, seven hundred twenty-one".