2217222765 has 48 divisors (see below), whose sum is σ = 4176007680. Its totient is φ = 1084129920.

The previous prime is 2217222757. The next prime is 2217222767. The reversal of 2217222765 is 5672227122.

It is not a de Polignac number, because 2217222765 - 2³ = 2217222757 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2217222767) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 15322 + ... + 68331.

It is an arithmetic number, because the mean of its divisors is an integer number (87000160).

Almost surely, 2^2217222765 is an apocalyptic number.

It is an amenable number.

2217222765 is a deficient number, since it is larger than the sum of its proper divisors (1958784915).

2217222765 is a wasteful number, since it uses less digits than its factorization.

2217222765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83714 (or 83711 counting only the distinct ones).

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

The square root of 2217222765 is about 47087.3949693546. The cubic root of 2217222765 is about 1303.9765349275.

Adding to 2217222765 its reverse (5672227122), we get a palindrome (7889449887).

The spelling of 2217222765 in words is "two billion, two hundred seventeen million, two hundred twenty-two thousand, seven hundred sixty-five".