55102172 has 12 divisors (see below), whose sum is σ = 96512640. Its totient is φ = 27527136.

The previous prime is 55102129. The next prime is 55102193. The reversal of 55102172 is 27120155.

It is a happy number.

55102172 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

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 in 3 ways as a sum of consecutive naturals, for example, 188 + ... + 10499.

It is an arithmetic number, because the mean of its divisors is an integer number (8042720).

Almost surely, 2^55102172 is an apocalyptic number.

It is an amenable number.

55102172 is a deficient number, since it is larger than the sum of its proper divisors (41410468).

55102172 is a wasteful number, since it uses less digits than its factorization.

55102172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11980 (or 11978 counting only the distinct ones).

The product of its (nonzero) digits is 700, while the sum is 23.

The square root of 55102172 is about 7423.0837257840. The cubic root of 55102172 is about 380.5305884422.

The spelling of 55102172 in words is "fifty-five million, one hundred two thousand, one hundred seventy-two".