549517161 has 4 divisors (see below), whose sum is σ = 732689552. Its totient is φ = 366344772.

The previous prime is 549517147. The next prime is 549517211. The reversal of 549517161 is 161715945.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a de Polignac number, because none of the positive numbers 2^k-549517161 is a prime.

It is a super-2 number, since 2×549517161² = 603938220466999842, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (549517141) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 91586191 + ... + 91586196.

It is an arithmetic number, because the mean of its divisors is an integer number (183172388).

Almost surely, 2^549517161 is an apocalyptic number.

It is an amenable number.

549517161 is a deficient number, since it is larger than the sum of its proper divisors (183172391).

549517161 is a wasteful number, since it uses less digits than its factorization.

549517161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 183172390.

The product of its digits is 37800, while the sum is 39.

The square root of 549517161 is about 23441.7823767733. The cubic root of 549517161 is about 819.0814426710.

The spelling of 549517161 in words is "five hundred forty-nine million, five hundred seventeen thousand, one hundred sixty-one".