55513222 has 16 divisors (see below), whose sum is σ = 84922992. Its totient is φ = 27210880.

The previous prime is 55513201. The next prime is 55513229. The reversal of 55513222 is 22231555.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55513229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21522 + ... + 23962.

It is an arithmetic number, because the mean of its divisors is an integer number (5307687).

Almost surely, 2^55513222 is an apocalyptic number.

55513222 is a deficient number, since it is larger than the sum of its proper divisors (29409770).

55513222 is a wasteful number, since it uses less digits than its factorization.

55513222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2663.

The product of its digits is 3000, while the sum is 25.

The square root of 55513222 is about 7450.7195625658. The cubic root of 55513222 is about 381.4744699083.

Adding to 55513222 its reverse (22231555), we get a palindrome (77744777).

The spelling of 55513222 in words is "fifty-five million, five hundred thirteen thousand, two hundred twenty-two".