2286556821 has 24 divisors (see below), whose sum is σ = 3402926904. Its totient is φ = 1478424960.

The previous prime is 2286556751. The next prime is 2286556829. The reversal of 2286556821 is 1286556822.

It is a happy number.

2286556821 is a `hidden beast` number, since 2 + 2 + 8 + 65 + 568 + 21 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 141848100 + 2144708721 = 11910^2 + 46311^2 .

It is not a de Polignac number, because 2286556821 - 2⁷ = 2286556693 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2286556829) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 94731 + ... + 116391.

It is an arithmetic number, because the mean of its divisors is an integer number (141788621).

Almost surely, 2^2286556821 is an apocalyptic number.

It is an amenable number.

2286556821 is a deficient number, since it is larger than the sum of its proper divisors (1116370083).

2286556821 is a wasteful number, since it uses less digits than its factorization.

2286556821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22021 (or 22018 counting only the distinct ones).

The product of its digits is 460800, while the sum is 45.

The square root of 2286556821 is about 47817.9550064617. The cubic root of 2286556821 is about 1317.4293444365.

Subtracting from 2286556821 its reverse (1286556822), we obtain a palindrome (999999999).

The spelling of 2286556821 in words is "two billion, two hundred eighty-six million, five hundred fifty-six thousand, eight hundred twenty-one".