545533421 has 8 divisors (see below), whose sum is σ = 557134200. Its totient is φ = 534054400.

The previous prime is 545533409. The next prime is 545533427. The reversal of 545533421 is 124335545.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 164737225 + 380796196 = 12835^2 + 19514^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 545533421 - 2⁶ = 545533357 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (545533427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21356 + ... + 39333.

It is an arithmetic number, because the mean of its divisors is an integer number (69641775).

Almost surely, 2^545533421 is an apocalyptic number.

It is an amenable number.

545533421 is a deficient number, since it is larger than the sum of its proper divisors (11600779).

545533421 is a wasteful number, since it uses less digits than its factorization.

545533421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60879.

The product of its digits is 36000, while the sum is 32.

The square root of 545533421 is about 23356.6568883477. The cubic root of 545533421 is about 817.0973223449.

Adding to 545533421 its reverse (124335545), we get a palindrome (669868966).

The spelling of 545533421 in words is "five hundred forty-five million, five hundred thirty-three thousand, four hundred twenty-one".