2215745 has 32 divisors (see below), whose sum is σ = 3283200. Its totient is φ = 1403136.

The previous prime is 2215699. The next prime is 2215777. The reversal of 2215745 is 5475122.

It is not a de Polignac number, because 2215745 - 2¹⁴ = 2199361 is a prime.

It is a Curzon 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, 37526 + ... + 37584.

It is an arithmetic number, because the mean of its divisors is an integer number (102600).

2^2215745 is an apocalyptic number.

It is an amenable number.

2215745 is a deficient number, since it is larger than the sum of its proper divisors (1067455).

2215745 is a wasteful number, since it uses less digits than its factorization.

2215745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137.

The product of its digits is 2800, while the sum is 26.

The square root of 2215745 is about 1488.5378732165. The cubic root of 2215745 is about 130.3686773162.

The spelling of 2215745 in words is "two million, two hundred fifteen thousand, seven hundred forty-five".