549161481 has 32 divisors (see below), whose sum is σ = 809680896. Its totient is φ = 328320000.

The previous prime is 549161453. The next prime is 549161519. The reversal of 549161481 is 184161945.

It is not a de Polignac number, because 549161481 - 2¹⁰ = 549160457 is a prime.

It is a super-2 number, since 2×549161481² = 603156664428226722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (549161441) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 951465 + ... + 952041.

It is an arithmetic number, because the mean of its divisors is an integer number (25302528).

Almost surely, 2^549161481 is an apocalyptic number.

It is an amenable number.

549161481 is a deficient number, since it is larger than the sum of its proper divisors (260519415).

549161481 is a wasteful number, since it uses less digits than its factorization.

549161481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 933.

The product of its digits is 34560, while the sum is 39.

The square root of 549161481 is about 23434.1946949324. The cubic root of 549161481 is about 818.9046852154.

The spelling of 549161481 in words is "five hundred forty-nine million, one hundred sixty-one thousand, four hundred eighty-one".