55112512 has 56 divisors (see below), whose sum is σ = 134615936. Its totient is φ = 21800448.

The previous prime is 55112507. The next prime is 55112537. The reversal of 55112512 is 21521155.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (56).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1093 + ... + 10555.

It is an arithmetic number, because the mean of its divisors is an integer number (2403856).

Almost surely, 2^55112512 is an apocalyptic number.

55112512 is a gapful number since it is divisible by the number (52) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55112512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (67307968).

55112512 is an abundant number, since it is smaller than the sum of its proper divisors (79503424).

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

55112512 is a wasteful number, since it uses less digits than its factorization.

55112512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9495 (or 9485 counting only the distinct ones).

The product of its digits is 500, while the sum is 22.

The square root of 55112512 is about 7423.7801691591. The cubic root of 55112512 is about 380.5543893200.

Adding to 55112512 its reverse (21521155), we get a palindrome (76633667).

It can be divided in two parts, 55112 and 512, that multiplied together give a square (28217344 = 5312²).

The spelling of 55112512 in words is "fifty-five million, one hundred twelve thousand, five hundred twelve".