2355223021 has 2 divisors, whose sum is σ = 2355223022. Its totient is φ = 2355223020.

The previous prime is 2355223019. The next prime is 2355223037. The reversal of 2355223021 is 1203225532.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2170534921 + 184688100 = 46589^2 + 13590^2 .

It is a cyclic number.

It is not a de Polignac number, because 2355223021 - 2¹ = 2355223019 is a prime.

Together with 2355223019, 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 (2355223051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1177611510 + 1177611511.

It is an arithmetic number, because the mean of its divisors is an integer number (1177611511).

Almost surely, 2^2355223021 is an apocalyptic number.

It is an amenable number.

2355223021 is a deficient number, since it is larger than the sum of its proper divisors (1).

2355223021 is an equidigital number, since it uses as much as digits as its factorization.

2355223021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3600, while the sum is 25.

The square root of 2355223021 is about 48530.6400225672. The cubic root of 2355223021 is about 1330.4871340116.

Adding to 2355223021 its reverse (1203225532), we get a palindrome (3558448553).

The spelling of 2355223021 in words is "two billion, three hundred fifty-five million, two hundred twenty-three thousand, twenty-one".