55000320 has 72 divisors (see below), whose sum is σ = 175669536. Its totient is φ = 14665728.

The previous prime is 55000301. The next prime is 55000357. The reversal of 55000320 is 2300055.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 55000320.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3322 + ... + 11001.

Almost surely, 2^55000320 is an apocalyptic number.

It is an amenable number.

55000320 is an abundant number, since it is smaller than the sum of its proper divisors (120669216).

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

55000320 is a wasteful number, since it uses less digits than its factorization.

55000320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14347 (or 14333 counting only the distinct ones).

The product of its (nonzero) digits is 150, while the sum is 15.

The square root of 55000320 is about 7416.2200614599. The cubic root of 55000320 is about 380.2959836170.

Adding to 55000320 its reverse (2300055), we get a palindrome (57300375).

The spelling of 55000320 in words is "fifty-five million, three hundred twenty", and thus it is an aban number.