55122231 has 8 divisors (see below), whose sum is σ = 73657584. Its totient is φ = 36667520.

The previous prime is 55122217. The next prime is 55122241. The reversal of 55122231 is 13222155.

55122231 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 55122231 - 2⁶ = 55122167 is a prime.

It is a super-2 number, since 2×55122231² = 6076920700834722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 55122198 and 55122207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55122241) 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 7 ways as a sum of consecutive naturals, for example, 18546 + ... + 21311.

It is an arithmetic number, because the mean of its divisors is an integer number (9207198).

Almost surely, 2^55122231 is an apocalyptic number.

55122231 is a deficient number, since it is larger than the sum of its proper divisors (18535353).

55122231 is a wasteful number, since it uses less digits than its factorization.

55122231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40321.

The product of its digits is 600, while the sum is 21.

The square root of 55122231 is about 7424.4347259573. The cubic root of 55122231 is about 380.5767580501.

Adding to 55122231 its reverse (13222155), we get a palindrome (68344386).

The spelling of 55122231 in words is "fifty-five million, one hundred twenty-two thousand, two hundred thirty-one".