2091015 has 24 divisors (see below), whose sum is σ = 3760848. Its totient is φ = 1114560.

The previous prime is 2090989. The next prime is 2091053. The reversal of 2091015 is 5101902.

It is not a de Polignac number, because 2091015 - 2⁶ = 2090951 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 355 + ... + 2075.

It is an arithmetic number, because the mean of its divisors is an integer number (156702).

2^2091015 is an apocalyptic number.

2091015 is a deficient number, since it is larger than the sum of its proper divisors (1669833).

2091015 is an equidigital number, since it uses as much as digits as its factorization.

2091015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1741 (or 1729 counting only the distinct ones).

The product of its (nonzero) digits is 90, while the sum is 18.

The square root of 2091015 is about 1446.0342319599. The cubic root of 2091015 is about 127.8750204247.

Adding to 2091015 its reverse (5101902), we get a palindrome (7192917).

The spelling of 2091015 in words is "two million, ninety-one thousand, fifteen".