2171225233 has 4 divisors (see below), whose sum is σ = 2224181988. Its totient is φ = 2118268480.

The previous prime is 2171225219. The next prime is 2171225239. The reversal of 2171225233 is 3325221712.

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 662135824 + 1509089409 = 25732^2 + 38847^2 .

It is a cyclic number.

It is not a de Polignac number, because 2171225233 - 2⁵ = 2171225201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2171225239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26478316 + ... + 26478397.

It is an arithmetic number, because the mean of its divisors is an integer number (556045497).

Almost surely, 2^2171225233 is an apocalyptic number.

It is an amenable number.

2171225233 is a deficient number, since it is larger than the sum of its proper divisors (52956755).

2171225233 is an equidigital number, since it uses as much as digits as its factorization.

2171225233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52956754.

The product of its digits is 5040, while the sum is 28.

The square root of 2171225233 is about 46596.4079409561. The cubic root of 2171225233 is about 1294.8962082953.

Adding to 2171225233 its reverse (3325221712), we get a palindrome (5496446945).

The spelling of 2171225233 in words is "two billion, one hundred seventy-one million, two hundred twenty-five thousand, two hundred thirty-three".