545288081 has 4 divisors (see below), whose sum is σ = 587233332. Its totient is φ = 503342832.

The previous prime is 545288053. The next prime is 545288083. The reversal of 545288081 is 180882545.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 180882545 = 5 ⋅36176509.

It can be written as a sum of positive squares in 2 ways, for example, as 289000000 + 256288081 = 17000^2 + 16009^2 .

It is a cyclic number.

It is not a de Polignac number, because 545288081 - 2¹⁸ = 545025937 is a prime.

It is a super-2 number, since 2×545288081² = 594678182561325122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (545288083) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20972606 + ... + 20972631.

It is an arithmetic number, because the mean of its divisors is an integer number (146808333).

Almost surely, 2^545288081 is an apocalyptic number.

It is an amenable number.

545288081 is a deficient number, since it is larger than the sum of its proper divisors (41945251).

545288081 is a wasteful number, since it uses less digits than its factorization.

545288081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41945250.

The product of its (nonzero) digits is 102400, while the sum is 41.

The square root of 545288081 is about 23351.4042618426. The cubic root of 545288081 is about 816.9748142892.

The spelling of 545288081 in words is "five hundred forty-five million, two hundred eighty-eight thousand, eighty-one".