2122453345 has 4 divisors (see below), whose sum is σ = 2546944020. Its totient is φ = 1697962672.

The previous prime is 2122453343. The next prime is 2122453351. The reversal of 2122453345 is 5433542212.

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 783552064 + 1338901281 = 27992^2 + 36591^2 .

It is a cyclic number.

It is not a de Polignac number, because 2122453345 - 2¹ = 2122453343 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2122453343) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 212245330 + ... + 212245339.

It is an arithmetic number, because the mean of its divisors is an integer number (636736005).

Almost surely, 2^2122453345 is an apocalyptic number.

It is an amenable number.

2122453345 is a deficient number, since it is larger than the sum of its proper divisors (424490675).

2122453345 is an equidigital number, since it uses as much as digits as its factorization.

2122453345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 424490674.

The product of its digits is 28800, while the sum is 31.

The square root of 2122453345 is about 46070.0916539136. The cubic root of 2122453345 is about 1285.1270082944.

Adding to 2122453345 its reverse (5433542212), we get a palindrome (7555995557).

The spelling of 2122453345 in words is "two billion, one hundred twenty-two million, four hundred fifty-three thousand, three hundred forty-five".