55221722 has 8 divisors (see below), whose sum is σ = 83020896. Its totient is φ = 27548092.

The previous prime is 55221721. The next prime is 55221731. The reversal of 55221722 is 22712255.

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

It is a junction number, because it is equal to n+sod(n) for n = 55221691 and 55221700.

It is not an unprimeable number, because it can be changed into a prime (55221721) 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, 30278 + ... + 32049.

It is an arithmetic number, because the mean of its divisors is an integer number (10377612).

Almost surely, 2^55221722 is an apocalyptic number.

55221722 is a deficient number, since it is larger than the sum of its proper divisors (27799174).

55221722 is a wasteful number, since it uses less digits than its factorization.

55221722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62772.

The product of its digits is 2800, while the sum is 26.

The square root of 55221722 is about 7431.1319460766. The cubic root of 55221722 is about 380.8055901320.

Adding to 55221722 its reverse (22712255), we get a palindrome (77933977).

The spelling of 55221722 in words is "fifty-five million, two hundred twenty-one thousand, seven hundred twenty-two".