55212122 has 24 divisors (see below), whose sum is σ = 98397504. Its totient is φ = 23156952.

The previous prime is 55212083. The next prime is 55212127. The reversal of 55212122 is 22121255.

It is a happy number.

55212122 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 = 55212094 and 55212103.

It is not an unprimeable number, because it can be changed into a prime (55212127) 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 11 ways as a sum of consecutive naturals, for example, 1388 + ... + 10599.

It is an arithmetic number, because the mean of its divisors is an integer number (4099896).

Almost surely, 2^55212122 is an apocalyptic number.

55212122 is a deficient number, since it is larger than the sum of its proper divisors (43185382).

55212122 is a wasteful number, since it uses less digits than its factorization.

55212122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12050 (or 12043 counting only the distinct ones).

The product of its digits is 400, while the sum is 20.

The square root of 55212122 is about 7430.4859867979. The cubic root of 55212122 is about 380.7835218504.

Adding to 55212122 its reverse (22121255), we get a palindrome (77333377).

The spelling of 55212122 in words is "fifty-five million, two hundred twelve thousand, one hundred twenty-two".