2091500 has 48 divisors (see below), whose sum is σ = 4717440. Its totient is φ = 809600.

The previous prime is 2091497. The next prime is 2091503. The reversal of 2091500 is 51902.

It is an interprime number because it is at equal distance from previous prime (2091497) and next prime (2091503).

It is not an unprimeable number, because it can be changed into a prime (2091503) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23456 + ... + 23544.

It is an arithmetic number, because the mean of its divisors is an integer number (98280).

2^2091500 is an apocalyptic number.

2091500 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2091500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2358720).

2091500 is an abundant number, since it is smaller than the sum of its proper divisors (2625940).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2091500 is a wasteful number, since it uses less digits than its factorization.

2091500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155 (or 143 counting only the distinct ones).

The product of its (nonzero) digits is 90, while the sum is 17.

The square root of 2091500 is about 1446.2019222778. The cubic root of 2091500 is about 127.8849063079.

The spelling of 2091500 in words is "two million, ninety-one thousand, five hundred".