2281663 has 2 divisors, whose sum is σ = 2281664. Its totient is φ = 2281662.

The previous prime is 2281661. The next prime is 2281667. The reversal of 2281663 is 3661822.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2281663 - 2¹ = 2281661 is a prime.

Together with 2281661, it forms a pair of twin primes.

2281663 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2281661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1140831 + 1140832.

It is an arithmetic number, because the mean of its divisors is an integer number (1140832).

2^2281663 is an apocalyptic number.

2281663 is a deficient number, since it is larger than the sum of its proper divisors (1).

2281663 is an equidigital number, since it uses as much as digits as its factorization.

2281663 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3456, while the sum is 28.

The square root of 2281663 is about 1510.5174610047. The cubic root of 2281663 is about 131.6488793647.

It can be divided in two parts, 228 and 1663, that added together give a triangular number (1891 = T₆₁).

The spelling of 2281663 in words is "two million, two hundred eighty-one thousand, six hundred sixty-three".