55099172 has 6 divisors (see below), whose sum is σ = 96423558. Its totient is φ = 27549584.

The previous prime is 55099169. The next prime is 55099189. The reversal of 55099172 is 27199055.

55099172 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 43375396 + 11723776 = 6586^2 + 3424^2 .

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 6887393 + ... + 6887400.

It is an arithmetic number, because the mean of its divisors is an integer number (16070593).

Almost surely, 2^55099172 is an apocalyptic number.

It is an amenable number.

55099172 is a deficient number, since it is larger than the sum of its proper divisors (41324386).

55099172 is a wasteful number, since it uses less digits than its factorization.

55099172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13774797 (or 13774795 counting only the distinct ones).

The product of its (nonzero) digits is 28350, while the sum is 38.

The square root of 55099172 is about 7422.8816506799. The cubic root of 55099172 is about 380.5236824078.

The spelling of 55099172 in words is "fifty-five million, ninety-nine thousand, one hundred seventy-two".