55820112 has 80 divisors (see below), whose sum is σ = 155115072. Its totient is φ = 17233920.

The previous prime is 55820101. The next prime is 55820113. The reversal of 55820112 is 21102855.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55820113) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 54162 + ... + 55182.

Almost surely, 2^55820112 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55820112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (77557536).

55820112 is an abundant number, since it is smaller than the sum of its proper divisors (99294960).

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

55820112 is a wasteful number, since it uses less digits than its factorization.

55820112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1116 (or 1110 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 24.

The square root of 55820112 is about 7471.2858331080. The cubic root of 55820112 is about 382.1761383556.

Adding to 55820112 its reverse (21102855), we get a palindrome (76922967).

The spelling of 55820112 in words is "fifty-five million, eight hundred twenty thousand, one hundred twelve".