55105320 has 64 divisors (see below), whose sum is σ = 174024000. Its totient is φ = 13920768.

The previous prime is 55105261. The next prime is 55105331. The reversal of 55105320 is 2350155.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9805 + ... + 14364.

It is an arithmetic number, because the mean of its divisors is an integer number (2719125).

Almost surely, 2^55105320 is an apocalyptic number.

It is an amenable number.

55105320 is an abundant number, since it is smaller than the sum of its proper divisors (118918680).

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

55105320 is a wasteful number, since it uses less digits than its factorization.

55105320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24202 (or 24198 counting only the distinct ones).

The product of its (nonzero) digits is 750, while the sum is 21.

The square root of 55105320 is about 7423.2957640121. The cubic root of 55105320 is about 380.5378349048.

Adding to 55105320 its reverse (2350155), we get a palindrome (57455475).

The spelling of 55105320 in words is "fifty-five million, one hundred five thousand, three hundred twenty".