547138881 has 45 divisors (see below), whose sum is σ = 862040179. Its totient is φ = 345812544.

The previous prime is 547138873. The next prime is 547138957. The reversal of 547138881 is 188831745.

It is a happy number.

The square root of 547138881 is 23391.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 9641025 + 537497856 = 3105^2 + 23184^2 .

It is not a de Polignac number, because 547138881 - 2³ = 547138873 is a prime.

It is a super-2 number, since 2×547138881² = 598721910203864322, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (547138811) by changing a digit.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 4841881 + ... + 4841993.

Almost surely, 2^547138881 is an apocalyptic number.

547138881 is the 23391-st square number.

547138881 is the 11696-th centered octagonal number.

It is an amenable number.

547138881 is a deficient number, since it is larger than the sum of its proper divisors (314901298).

547138881 is an equidigital number, since it uses as much as digits as its factorization.

547138881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 284 (or 139 counting only the distinct ones).

The product of its digits is 215040, while the sum is 45.

The cubic root of 547138881 is about 817.8980874065.

The spelling of 547138881 in words is "five hundred forty-seven million, one hundred thirty-eight thousand, eight hundred eighty-one".