2281997 has 4 divisors (see below), whose sum is σ = 2286396. Its totient is φ = 2277600.

The previous prime is 2281987. The next prime is 2282017. The reversal of 2281997 is 7991822.

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

It can be written as a sum of positive squares in 2 ways, for example, as 808201 + 1473796 = 899^2 + 1214^2 .

It is a cyclic number.

It is not a de Polignac number, because 2281997 - 2¹² = 2277901 is a prime.

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 2281997.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2281987) 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, 1298 + ... + 2499.

It is an arithmetic number, because the mean of its divisors is an integer number (571599).

2^2281997 is an apocalyptic number.

It is an amenable number.

2281997 is a deficient number, since it is larger than the sum of its proper divisors (4399).

2281997 is an equidigital number, since it uses as much as digits as its factorization.

2281997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4398.

The product of its digits is 18144, while the sum is 38.

The square root of 2281997 is about 1510.6280150984. The cubic root of 2281997 is about 131.6553028345.

The spelling of 2281997 in words is "two million, two hundred eighty-one thousand, nine hundred ninety-seven".