550072161 has 16 divisors (see below), whose sum is σ = 832262400. Its totient is φ = 358911504.

The previous prime is 550072157. The next prime is 550072177. The reversal of 550072161 is 161270055.

It is not a de Polignac number, because 550072161 - 2² = 550072157 is a prime.

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

It is not an unprimeable number, because it can be changed into a prime (550072561) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 215466 + ... + 218003.

It is an arithmetic number, because the mean of its divisors is an integer number (52016400).

Almost surely, 2^550072161 is an apocalyptic number.

It is an amenable number.

550072161 is a deficient number, since it is larger than the sum of its proper divisors (282190239).

550072161 is a wasteful number, since it uses less digits than its factorization.

550072161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 433525 (or 433519 counting only the distinct ones).

The product of its (nonzero) digits is 2100, while the sum is 27.

The square root of 550072161 is about 23453.6172263470. The cubic root of 550072161 is about 819.3571011805.

The spelling of 550072161 in words is "five hundred fifty million, seventy-two thousand, one hundred sixty-one".