2991215 has 8 divisors (see below), whose sum is σ = 3643440. Its totient is φ = 2356992.

The previous prime is 2991203. The next prime is 2991217. The reversal of 2991215 is 5121992.

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

It is a cyclic number.

It is not a de Polignac number, because 2991215 - 2⁴ = 2991199 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2991217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4130 + ... + 4799.

It is an arithmetic number, because the mean of its divisors is an integer number (455430).

2^2991215 is an apocalyptic number.

2991215 is a deficient number, since it is larger than the sum of its proper divisors (652225).

2991215 is an equidigital number, since it uses as much as digits as its factorization.

2991215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9001.

The product of its digits is 1620, while the sum is 29.

The square root of 2991215 is about 1729.5129372167. The cubic root of 2991215 is about 144.0840398072.

The spelling of 2991215 in words is "two million, nine hundred ninety-one thousand, two hundred fifteen".