2091550 has 24 divisors (see below), whose sum is σ = 3961800. Its totient is φ = 821280.

The previous prime is 2091521. The next prime is 2091553. The reversal of 2091550 is 551902.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2091553) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2596 + ... + 3304.

It is an arithmetic number, because the mean of its divisors is an integer number (165075).

2^2091550 is an apocalyptic number.

2091550 is a deficient number, since it is larger than the sum of its proper divisors (1870250).

2091550 is a wasteful number, since it uses less digits than its factorization.

2091550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 780 (or 775 counting only the distinct ones).

The product of its (nonzero) digits is 450, while the sum is 22.

The square root of 2091550 is about 1446.2192088338. The cubic root of 2091550 is about 127.8859253842.

The spelling of 2091550 in words is "two million, ninety-one thousand, five hundred fifty".