2220765 has 32 divisors (see below), whose sum is σ = 3822336. Its totient is φ = 1098240.

The previous prime is 2220749. The next prime is 2220773. The reversal of 2220765 is 5670222.

It is not a de Polignac number, because 2220765 - 2⁴ = 2220749 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 14067 + ... + 14223.

It is an arithmetic number, because the mean of its divisors is an integer number (119448).

2^2220765 is an apocalyptic number.

It is an amenable number.

2220765 is a deficient number, since it is larger than the sum of its proper divisors (1601571).

2220765 is a wasteful number, since it uses less digits than its factorization.

2220765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 229.

The product of its (nonzero) digits is 1680, while the sum is 24.

The square root of 2220765 is about 1490.2231376542. The cubic root of 2220765 is about 130.4670576412.

Adding to 2220765 its reverse (5670222), we get a palindrome (7890987).

The spelling of 2220765 in words is "two million, two hundred twenty thousand, seven hundred sixty-five".