55521323 has 16 divisors (see below), whose sum is σ = 65669856. Its totient is φ = 46275840.

The previous prime is 55521317. The next prime is 55521343. The reversal of 55521323 is 32312555.

55521323 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 55521323 - 2⁶ = 55521259 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 55521292 and 55521301.

It is not an unprimeable number, because it can be changed into a prime (55521343) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21215 + ... + 23687.

It is an arithmetic number, because the mean of its divisors is an integer number (4104366).

Almost surely, 2^55521323 is an apocalyptic number.

55521323 is a deficient number, since it is larger than the sum of its proper divisors (10148533).

55521323 is a wasteful number, since it uses less digits than its factorization.

55521323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2654.

The product of its digits is 4500, while the sum is 26.

The square root of 55521323 is about 7451.2631815015. The cubic root of 55521323 is about 381.4930250937.

Adding to 55521323 its reverse (32312555), we get a palindrome (87833878).

The spelling of 55521323 in words is "fifty-five million, five hundred twenty-one thousand, three hundred twenty-three".