54545321 has 4 divisors (see below), whose sum is σ = 55574532. Its totient is φ = 53516112.

The previous prime is 54545291. The next prime is 54545327. The reversal of 54545321 is 12354545.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 49505296 + 5040025 = 7036^2 + 2245^2 .

It is a cyclic number.

It is not a de Polignac number, because 54545321 - 2²² = 50351017 is a prime.

It is a super-3 number, since 3×54545321³ (a number of 24 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (54545327) 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, 514526 + ... + 514631.

It is an arithmetic number, because the mean of its divisors is an integer number (13893633).

Almost surely, 2^54545321 is an apocalyptic number.

It is an amenable number.

54545321 is a deficient number, since it is larger than the sum of its proper divisors (1029211).

54545321 is a wasteful number, since it uses less digits than its factorization.

54545321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1029210.

The product of its digits is 12000, while the sum is 29.

The square root of 54545321 is about 7385.4804176844. The cubic root of 54545321 is about 379.2443918644.

Adding to 54545321 its reverse (12354545), we get a palindrome (66899866).

The spelling of 54545321 in words is "fifty-four million, five hundred forty-five thousand, three hundred twenty-one".