55109632 has 48 divisors (see below), whose sum is σ = 112039200. Its totient is φ = 27095040.

The previous prime is 55109629. The next prime is 55109641. The reversal of 55109632 is 23690155.

It is a junction number, because it is equal to n+sod(n) for n = 55109594 and 55109603.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 145219 + ... + 145597.

It is an arithmetic number, because the mean of its divisors is an integer number (2334150).

Almost surely, 2^55109632 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 55109632, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (56019600).

55109632 is an abundant number, since it is smaller than the sum of its proper divisors (56929568).

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

55109632 is an equidigital number, since it uses as much as digits as its factorization.

55109632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 472 (or 452 counting only the distinct ones).

The product of its (nonzero) digits is 8100, while the sum is 31.

The square root of 55109632 is about 7423.5861953641. The cubic root of 55109632 is about 380.5477603611.

Adding to 55109632 its reverse (23690155), we get a palindrome (78799787).

The spelling of 55109632 in words is "fifty-five million, one hundred nine thousand, six hundred thirty-two".