2261999 has 4 divisors (see below), whose sum is σ = 2289336. Its totient is φ = 2234664.

The previous prime is 2261993. The next prime is 2262017. The reversal of 2261999 is 9991622.

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-2261999 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2261993) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13544 + ... + 13709.

It is an arithmetic number, because the mean of its divisors is an integer number (572334).

2^2261999 is an apocalyptic number.

2261999 is a deficient number, since it is larger than the sum of its proper divisors (27337).

2261999 is an equidigital number, since it uses as much as digits as its factorization.

2261999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27336.

The product of its digits is 17496, while the sum is 38.

The square root of 2261999 is about 1503.9943483936. The cubic root of 2261999 is about 131.2695922377.

The spelling of 2261999 in words is "two million, two hundred sixty-one thousand, nine hundred ninety-nine".