55017732 has 72 divisors (see below), whose sum is σ = 161293888. Its totient is φ = 14287680.

The previous prime is 55017731. The next prime is 55017757. The reversal of 55017732 is 23771055.

It is a self number, because there is not a number n which added to its sum of digits gives 55017732.

It is not an unprimeable number, because it can be changed into a prime (55017731) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7458 + ... + 12870.

Almost surely, 2^55017732 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 55017732, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (80646944).

55017732 is an abundant number, since it is smaller than the sum of its proper divisors (106276156).

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

55017732 is a wasteful number, since it uses less digits than its factorization.

55017732 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5449 (or 5436 counting only the distinct ones).

The product of its (nonzero) digits is 7350, while the sum is 30.

The square root of 55017732 is about 7417.3938819507. The cubic root of 55017732 is about 380.3361107473.

Adding to 55017732 its reverse (23771055), we get a palindrome (78788787).

The spelling of 55017732 in words is "fifty-five million, seventeen thousand, seven hundred thirty-two".