55021696 has 32 divisors (see below), whose sum is σ = 110955600. Its totient is φ = 27174144.

The previous prime is 55021693. The next prime is 55021711. The reversal of 55021696 is 69612055.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (32).

It is not an unprimeable number, because it can be changed into a prime (55021691) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8035 + ... + 13213.

Almost surely, 2^55021696 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 55021696, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (55477800).

55021696 is an abundant number, since it is smaller than the sum of its proper divisors (55933904).

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

55021696 is an equidigital number, since it uses as much as digits as its factorization.

55021696 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5276 (or 5264 counting only the distinct ones).

The product of its (nonzero) digits is 16200, while the sum is 34.

The square root of 55021696 is about 7417.6610868926. The cubic root of 55021696 is about 380.3452448700.

The spelling of 55021696 in words is "fifty-five million, twenty-one thousand, six hundred ninety-six".