55345422 has 64 divisors (see below), whose sum is σ = 125349120. Its totient is φ = 16147200.

The previous prime is 55345403. The next prime is 55345439. The reversal of 55345422 is 22454355.

It is a self number, because there is not a number n which added to its sum of digits gives 55345422.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 237418 + ... + 237650.

It is an arithmetic number, because the mean of its divisors is an integer number (1958580).

Almost surely, 2^55345422 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55345422, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (62674560).

55345422 is an abundant number, since it is smaller than the sum of its proper divisors (70003698).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

55345422 is a wasteful number, since it uses less digits than its factorization.

55345422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 369.

The product of its digits is 24000, while the sum is 30.

The square root of 55345422 is about 7439.4503829248. The cubic root of 55345422 is about 381.0897206053.

Adding to 55345422 its reverse (22454355), we get a palindrome (77799777).

The spelling of 55345422 in words is "fifty-five million, three hundred forty-five thousand, four hundred twenty-two".