2281765 has 4 divisors (see below), whose sum is σ = 2738124. Its totient is φ = 1825408.

The previous prime is 2281751. The next prime is 2281771. The reversal of 2281765 is 5671822.

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 515524 + 1766241 = 718^2 + 1329^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2281765 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 228172 + ... + 228181.

It is an arithmetic number, because the mean of its divisors is an integer number (684531).

2^2281765 is an apocalyptic number.

It is an amenable number.

2281765 is a deficient number, since it is larger than the sum of its proper divisors (456359).

2281765 is an equidigital number, since it uses as much as digits as its factorization.

2281765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 456358.

The product of its digits is 6720, while the sum is 31.

The square root of 2281765 is about 1510.5512238915. The cubic root of 2281765 is about 131.6508410896.

The spelling of 2281765 in words is "two million, two hundred eighty-one thousand, seven hundred sixty-five".