55173015 has 16 divisors (see below), whose sum is σ = 98085600. Its totient is φ = 29425536.

The previous prime is 55173011. The next prime is 55173023. The reversal of 55173015 is 51037155.

It is not a de Polignac number, because 55173015 - 2² = 55173011 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 55173015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55173011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 204210 + ... + 204479.

It is an arithmetic number, because the mean of its divisors is an integer number (6130350).

Almost surely, 2^55173015 is an apocalyptic number.

55173015 is a deficient number, since it is larger than the sum of its proper divisors (42912585).

55173015 is a wasteful number, since it uses less digits than its factorization.

55173015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 408703 (or 408697 counting only the distinct ones).

The product of its (nonzero) digits is 2625, while the sum is 27.

The square root of 55173015 is about 7427.8539969496. The cubic root of 55173015 is about 380.6935970423.

The spelling of 55173015 in words is "fifty-five million, one hundred seventy-three thousand, fifteen".