55109622 has 16 divisors (see below), whose sum is σ = 110307312. Its totient is φ = 18355200.

The previous prime is 55109591. The next prime is 55109623. The reversal of 55109622 is 22690155.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 55109622.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55109623) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6738 + ... + 12474.

It is an arithmetic number, because the mean of its divisors is an integer number (6894207).

Almost surely, 2^55109622 is an apocalyptic number.

55109622 is an abundant number, since it is smaller than the sum of its proper divisors (55197690).

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

55109622 is a wasteful number, since it uses less digits than its factorization.

55109622 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7343.

The product of its (nonzero) digits is 5400, while the sum is 30.

The square root of 55109622 is about 7423.5855218351. The cubic root of 55109622 is about 380.5477373435.

Adding to 55109622 its reverse (22690155), we get a palindrome (77799777).

The spelling of 55109622 in words is "fifty-five million, one hundred nine thousand, six hundred twenty-two".