55223229 has 4 divisors (see below), whose sum is σ = 73630976. Its totient is φ = 36815484.

The previous prime is 55223219. The next prime is 55223249. The reversal of 55223229 is 92232255.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 55223229 - 2⁵ = 55223197 is a prime.

It is a super-3 number, since 3×55223229³ (a number of 24 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 55223196 and 55223205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55223219) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9203869 + ... + 9203874.

It is an arithmetic number, because the mean of its divisors is an integer number (18407744).

Almost surely, 2^55223229 is an apocalyptic number.

It is an amenable number.

55223229 is a deficient number, since it is larger than the sum of its proper divisors (18407747).

55223229 is a wasteful number, since it uses less digits than its factorization.

55223229 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18407746.

The product of its digits is 10800, while the sum is 30.

The square root of 55223229 is about 7431.2333431268. The cubic root of 55223229 is about 380.8090541601.

The spelling of 55223229 in words is "fifty-five million, two hundred twenty-three thousand, two hundred twenty-nine".