2215775 has 12 divisors (see below), whose sum is σ = 2766192. Its totient is φ = 1760640.

The previous prime is 2215699. The next prime is 2215777. The reversal of 2215775 is 5775122.

2215775 is nontrivially palindromic in base 11.

It is a de Polignac number, because none of the positive numbers 2^k-2215775 is a prime.

It is a hoax number, since the sum of its digits (29) coincides with the sum of the digits of its distinct prime factors.

It is a d-powerful number, because it can be written as 2²⁰ + 2²⁰ + 1 + 5 + 7³ + 7⁶ + 5⁴ .

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2215777) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6407 + ... + 6743.

It is an arithmetic number, because the mean of its divisors is an integer number (230516).

2^2215775 is an apocalyptic number.

2215775 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

2215775 is a deficient number, since it is larger than the sum of its proper divisors (550417).

2215775 is a wasteful number, since it uses less digits than its factorization.

2215775 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 610 (or 605 counting only the distinct ones).

The product of its digits is 4900, while the sum is 29.

The square root of 2215775 is about 1488.5479501850. The cubic root of 2215775 is about 130.3692656876.

The spelling of 2215775 in words is "two million, two hundred fifteen thousand, seven hundred seventy-five".