55215422 has 32 divisors (see below), whose sum is σ = 90279360. Its totient is φ = 25231360.

The previous prime is 55215421. The next prime is 55215427. The reversal of 55215422 is 22451255.

55215422 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 55215391 and 55215400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55215421) 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 15 ways as a sum of consecutive naturals, for example, 214718 + ... + 214974.

It is an arithmetic number, because the mean of its divisors is an integer number (2821230).

Almost surely, 2^55215422 is an apocalyptic number.

55215422 is a deficient number, since it is larger than the sum of its proper divisors (35063938).

55215422 is a wasteful number, since it uses less digits than its factorization.

55215422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 436.

The product of its digits is 4000, while the sum is 26.

The square root of 55215422 is about 7430.7080416337. The cubic root of 55215422 is about 380.7911081107.

Adding to 55215422 its reverse (22451255), we get a palindrome (77666677).

The spelling of 55215422 in words is "fifty-five million, two hundred fifteen thousand, four hundred twenty-two".