2273566021 has 2 divisors, whose sum is σ = 2273566022. Its totient is φ = 2273566020.

The previous prime is 2273566019. The next prime is 2273566033. The reversal of 2273566021 is 1206653722.

2273566021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1861922500 + 411643521 = 43150^2 + 20289^2 .

It is a cyclic number.

It is not a de Polignac number, because 2273566021 - 2¹ = 2273566019 is a prime.

Together with 2273566019, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2273566051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1136783010 + 1136783011.

It is an arithmetic number, because the mean of its divisors is an integer number (1136783011).

Almost surely, 2^2273566021 is an apocalyptic number.

It is an amenable number.

2273566021 is a deficient number, since it is larger than the sum of its proper divisors (1).

2273566021 is an equidigital number, since it uses as much as digits as its factorization.

2273566021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 30240, while the sum is 34.

The square root of 2273566021 is about 47681.9255169084. The cubic root of 2273566021 is about 1314.9296653095.

The spelling of 2273566021 in words is "two billion, two hundred seventy-three million, five hundred sixty-six thousand, twenty-one".