55143222 has 8 divisors (see below), whose sum is σ = 110286456. Its totient is φ = 18381072.

The previous prime is 55143197. The next prime is 55143227. The reversal of 55143222 is 22234155.

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

55143222 is an admirable number.

It is a super-3 number, since 3×55143222³ (a number of 24 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 55143192 and 55143201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55143227) 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, 4595263 + ... + 4595274.

It is an arithmetic number, because the mean of its divisors is an integer number (13785807).

Almost surely, 2^55143222 is an apocalyptic number.

55143222 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

55143222 is a wasteful number, since it uses less digits than its factorization.

55143222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9190542.

The product of its digits is 2400, while the sum is 24.

The square root of 55143222 is about 7425.8482343770. The cubic root of 55143222 is about 380.6250608416.

Adding to 55143222 its reverse (22234155), we get a palindrome (77377377).

The spelling of 55143222 in words is "fifty-five million, one hundred forty-three thousand, two hundred twenty-two".