55172233 has 2 divisors, whose sum is σ = 55172234. Its totient is φ = 55172232.

The previous prime is 55172231. The next prime is 55172267. The reversal of 55172233 is 33227155.

55172233 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., 46895104 + 8277129 = 6848^2 + 2877^2 .

It is a cyclic number.

It is not a de Polignac number, because 55172233 - 2¹ = 55172231 is a prime.

Together with 55172231, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (55172231) 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 as a sum of consecutive naturals, namely, 27586116 + 27586117.

It is an arithmetic number, because the mean of its divisors is an integer number (27586117).

Almost surely, 2^55172233 is an apocalyptic number.

It is an amenable number.

55172233 is a deficient number, since it is larger than the sum of its proper divisors (1).

55172233 is an equidigital number, since it uses as much as digits as its factorization.

55172233 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6300, while the sum is 28.

The square root of 55172233 is about 7427.8013570639. The cubic root of 55172233 is about 380.6917984347.

Adding to 55172233 its reverse (33227155), we get a palindrome (88399388).

It can be divided in two parts, 5517 and 2233, that added together give a triangular number (7750 = T₁₂₄).

The spelling of 55172233 in words is "fifty-five million, one hundred seventy-two thousand, two hundred thirty-three".