2281685669 has 4 divisors (see below), whose sum is σ = 2324736396. Its totient is φ = 2238634944.

The previous prime is 2281685633. The next prime is 2281685671. The reversal of 2281685669 is 9665861822.

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 648313444 + 1633372225 = 25462^2 + 40415^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2281685669 is a prime.

It is a super-2 number, since 2×2281685669² = 10412178984239955122, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (53), and also a Moran number because the ratio is a prime number: 43050673 = 2281685669 / (2 + 2 + 8 + 1 + 6 + 8 + 5 + 6 + 6 + 9).

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 2281685669.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2281685689) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21525284 + ... + 21525389.

It is an arithmetic number, because the mean of its divisors is an integer number (581184099).

Almost surely, 2^2281685669 is an apocalyptic number.

It is an amenable number.

2281685669 is a deficient number, since it is larger than the sum of its proper divisors (43050727).

2281685669 is an equidigital number, since it uses as much as digits as its factorization.

2281685669 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43050726.

The product of its digits is 2488320, while the sum is 53.

The square root of 2281685669 is about 47766.9935101635. The cubic root of 2281685669 is about 1316.4931535349.

The spelling of 2281685669 in words is "two billion, two hundred eighty-one million, six hundred eighty-five thousand, six hundred sixty-nine".