55115532 has 48 divisors (see below), whose sum is σ = 143740800. Its totient is φ = 18262800.

The previous prime is 55115531. The next prime is 55115539. The reversal of 55115532 is 23551155.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 55115496 and 55115505.

It is not an unprimeable number, because it can be changed into a prime (55115531) 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, 17907 + ... + 20757.

It is an arithmetic number, because the mean of its divisors is an integer number (2994600).

Almost surely, 2^55115532 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 55115532, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (71870400).

55115532 is an abundant number, since it is smaller than the sum of its proper divisors (88625268).

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

55115532 is a wasteful number, since it uses less digits than its factorization.

55115532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3043 (or 3035 counting only the distinct ones).

The product of its digits is 3750, while the sum is 27.

The square root of 55115532 is about 7423.9835667922. The cubic root of 55115532 is about 380.5613402720.

Adding to 55115532 its reverse (23551155), we get a palindrome (78666687).

The spelling of 55115532 in words is "fifty-five million, one hundred fifteen thousand, five hundred thirty-two".