55221122 has 8 divisors (see below), whose sum is σ = 90361872. Its totient is φ = 25100500.

The previous prime is 55221119. The next prime is 55221143. The reversal of 55221122 is 22112255.

It is a happy number.

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

It is a zygodrome in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 55221094 and 55221103.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1255004 + ... + 1255047.

It is an arithmetic number, because the mean of its divisors is an integer number (11295234).

Almost surely, 2^55221122 is an apocalyptic number.

55221122 is a deficient number, since it is larger than the sum of its proper divisors (35140750).

55221122 is a wasteful number, since it uses less digits than its factorization.

55221122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2510064.

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

The square root of 55221122 is about 7431.0915752667. The cubic root of 55221122 is about 380.8042109393.

Adding to 55221122 its reverse (22112255), we get a palindrome (77333377).

The spelling of 55221122 in words is "fifty-five million, two hundred twenty-one thousand, one hundred twenty-two".