55502320 has 20 divisors (see below), whose sum is σ = 129043080. Its totient is φ = 22200896.

The previous prime is 55502311. The next prime is 55502327. The reversal of 55502320 is 2320555.

It is a tau number, because it is divible by the number of its divisors (20).

It is a junction number, because it is equal to n+sod(n) for n = 55502291 and 55502300.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55502327) 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, 346810 + ... + 346969.

It is an arithmetic number, because the mean of its divisors is an integer number (6452154).

Almost surely, 2^55502320 is an apocalyptic number.

It is an amenable number.

55502320 is an abundant number, since it is smaller than the sum of its proper divisors (73540760).

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

55502320 is a wasteful number, since it uses less digits than its factorization.

55502320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 693792 (or 693786 counting only the distinct ones).

The product of its (nonzero) digits is 1500, while the sum is 22.

The square root of 55502320 is about 7449.9879194533. The cubic root of 55502320 is about 381.4494962366.

Adding to 55502320 its reverse (2320555), we get a palindrome (57822875).

The spelling of 55502320 in words is "fifty-five million, five hundred two thousand, three hundred twenty".