55133223 has 4 divisors (see below), whose sum is σ = 73510968. Its totient is φ = 36755480.

The previous prime is 55133201. The next prime is 55133251. The reversal of 55133223 is 32233155.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 55133223 - 2⁹ = 55132711 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 55133193 and 55133202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55133123) 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, 9188868 + ... + 9188873.

It is an arithmetic number, because the mean of its divisors is an integer number (18377742).

Almost surely, 2^55133223 is an apocalyptic number.

55133223 is a deficient number, since it is larger than the sum of its proper divisors (18377745).

55133223 is a wasteful number, since it uses less digits than its factorization.

55133223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18377744.

The product of its digits is 2700, while the sum is 24.

The square root of 55133223 is about 7425.1749474339. The cubic root of 55133223 is about 380.6020534806.

Adding to 55133223 its reverse (32233155), we get a palindrome (87366378).

The spelling of 55133223 in words is "fifty-five million, one hundred thirty-three thousand, two hundred twenty-three".