2217965 has 16 divisors (see below), whose sum is σ = 2881920. Its totient is φ = 1632960.

The previous prime is 2217947. The next prime is 2217967. The reversal of 2217965 is 5697122.

It is not a de Polignac number, because 2217965 - 2¹⁰ = 2216941 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2217967) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3200 + ... + 3830.

It is an arithmetic number, because the mean of its divisors is an integer number (180120).

2^2217965 is an apocalyptic number.

It is an amenable number.

2217965 is a deficient number, since it is larger than the sum of its proper divisors (663955).

2217965 is a wasteful number, since it uses less digits than its factorization.

2217965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 692.

The product of its digits is 7560, while the sum is 32.

The square root of 2217965 is about 1489.2833847190. The cubic root of 2217965 is about 130.4122024600.

The spelling of 2217965 in words is "two million, two hundred seventeen thousand, nine hundred sixty-five".