55215175 has 12 divisors (see below), whose sum is σ = 68767920. Its totient is φ = 43977920.

The previous prime is 55215161. The next prime is 55215179. The reversal of 55215175 is 57151255.

It is not a de Polignac number, because 55215175 - 2⁷ = 55215047 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55215179) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 1086 + ... + 10564.

It is an arithmetic number, because the mean of its divisors is an integer number (5730660).

Almost surely, 2^55215175 is an apocalyptic number.

55215175 is a deficient number, since it is larger than the sum of its proper divisors (13552745).

55215175 is a wasteful number, since it uses less digits than its factorization.

55215175 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9722 (or 9717 counting only the distinct ones).

The product of its digits is 8750, while the sum is 31.

The square root of 55215175 is about 7430.6914213955. The cubic root of 55215175 is about 380.7905403011.

The spelling of 55215175 in words is "fifty-five million, two hundred fifteen thousand, one hundred seventy-five".