2216567761 has 4 divisors (see below), whose sum is σ = 2227819572. Its totient is φ = 2205315952.

The previous prime is 2216567747. The next prime is 2216567791. The reversal of 2216567761 is 1677656122.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1487567761 + 729000000 = 38569^2 + 27000^2 .

It is a cyclic number.

It is not a de Polignac number, because 2216567761 - 2¹⁷ = 2216436689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2216567791) 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, 5625610 + ... + 5626003.

It is an arithmetic number, because the mean of its divisors is an integer number (556954893).

Almost surely, 2^2216567761 is an apocalyptic number.

It is an amenable number.

2216567761 is a deficient number, since it is larger than the sum of its proper divisors (11251811).

2216567761 is a wasteful number, since it uses less digits than its factorization.

2216567761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11251810.

The product of its digits is 211680, while the sum is 43.

The square root of 2216567761 is about 47080.4392609075. The cubic root of 2216567761 is about 1303.8481169235.

The spelling of 2216567761 in words is "two billion, two hundred sixteen million, five hundred sixty-seven thousand, seven hundred sixty-one".