2251999 has 8 divisors (see below), whose sum is σ = 2367360. Its totient is φ = 2138136.

The previous prime is 2251993. The next prime is 2252009. The reversal of 2251999 is 9991522.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2251999 - 2¹⁹ = 1727711 is a prime.

It is a Duffinian number.

2251999 is a lucky number.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2251993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3844 + ... + 4390.

It is an arithmetic number, because the mean of its divisors is an integer number (295920).

2^2251999 is an apocalyptic number.

2251999 is a deficient number, since it is larger than the sum of its proper divisors (115361).

2251999 is a wasteful number, since it uses less digits than its factorization.

2251999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 749.

The product of its digits is 14580, while the sum is 37.

The square root of 2251999 is about 1500.6661853990. Note that the first 3 decimals coincide. The cubic root of 2251999 is about 131.0758646092.

The spelling of 2251999 in words is "two million, two hundred fifty-one thousand, nine hundred ninety-nine".