55145622 has 32 divisors (see below), whose sum is σ = 126865152. Its totient is φ = 15653664.

The previous prime is 55145591. The next prime is 55145627. The reversal of 55145622 is 22654155.

55145622 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 55145622.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55145627) 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 15 ways as a sum of consecutive naturals, for example, 2413 + ... + 10775.

It is an arithmetic number, because the mean of its divisors is an integer number (3964536).

Almost surely, 2^55145622 is an apocalyptic number.

55145622 is an abundant number, since it is smaller than the sum of its proper divisors (71719530).

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

55145622 is a wasteful number, since it uses less digits than its factorization.

55145622 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8532.

The product of its digits is 12000, while the sum is 30.

The square root of 55145622 is about 7426.0098303194. The cubic root of 55145622 is about 380.6305827466.

Adding to 55145622 its reverse (22654155), we get a palindrome (77799777).

The spelling of 55145622 in words is "fifty-five million, one hundred forty-five thousand, six hundred twenty-two".