2099231 has 4 divisors (see below), whose sum is σ = 2118600. Its totient is φ = 2079864.

The previous prime is 2099221. The next prime is 2099249. The reversal of 2099231 is 1329902.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2099231 is a prime.

It is a super-2 number, since 2×2099231² = 8813541582722, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2099231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2099221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9521 + ... + 9738.

It is an arithmetic number, because the mean of its divisors is an integer number (529650).

2^2099231 is an apocalyptic number.

2099231 is a deficient number, since it is larger than the sum of its proper divisors (19369).

2099231 is a wasteful number, since it uses less digits than its factorization.

2099231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19368.

The product of its (nonzero) digits is 972, while the sum is 26.

The square root of 2099231 is about 1448.8723201166. The cubic root of 2099231 is about 128.0422833939.

The spelling of 2099231 in words is "two million, ninety-nine thousand, two hundred thirty-one".