55811112 has 64 divisors (see below), whose sum is σ = 161740800. Its totient is φ = 15718080.

The previous prime is 55811101. The next prime is 55811117. The reversal of 55811112 is 21111855.

It is a super-2 number, since 2×55811112² = 6229760445353088, which contains 22 as substring.

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

It is not an unprimeable number, because it can be changed into a prime (55811117) 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, 9589 + ... + 14267.

It is an arithmetic number, because the mean of its divisors is an integer number (2527200).

Almost surely, 2^55811112 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 55811112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (80870400).

55811112 is an abundant number, since it is smaller than the sum of its proper divisors (105929688).

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

55811112 is a wasteful number, since it uses less digits than its factorization.

55811112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4766 (or 4762 counting only the distinct ones).

The product of its digits is 400, while the sum is 24.

The square root of 55811112 is about 7470.6835028664. The cubic root of 55811112 is about 382.1555975505.

Adding to 55811112 its reverse (21111855), we get a palindrome (76922967).

The spelling of 55811112 in words is "fifty-five million, eight hundred eleven thousand, one hundred twelve".