2215591 has 8 divisors (see below), whose sum is σ = 2555424. Its totient is φ = 1881600.

The previous prime is 2215583. The next prime is 2215639. The reversal of 2215591 is 1955122.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2215591 - 2³ = 2215583 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2215501) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 610 + ... + 2191.

It is an arithmetic number, because the mean of its divisors is an integer number (319428).

2^2215591 is an apocalyptic number.

2215591 is a deficient number, since it is larger than the sum of its proper divisors (339833).

2215591 is a wasteful number, since it uses less digits than its factorization.

2215591 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2921.

The product of its digits is 900, while the sum is 25.

The square root of 2215591 is about 1488.4861437044. The cubic root of 2215591 is about 130.3656569263.

The spelling of 2215591 in words is "two million, two hundred fifteen thousand, five hundred ninety-one".