545322309 has 16 divisors (see below), whose sum is σ = 845053440. Its totient is φ = 306330480.

The previous prime is 545322307. The next prime is 545322343. The reversal of 545322309 is 903223545.

It is not a de Polignac number, because 545322309 - 2¹ = 545322307 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 545322309.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (545322307) 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 15 ways as a sum of consecutive naturals, for example, 218827 + ... + 221304.

It is an arithmetic number, because the mean of its divisors is an integer number (52815840).

Almost surely, 2^545322309 is an apocalyptic number.

545322309 is a gapful number since it is divisible by the number (59) formed by its first and last digit.

It is an amenable number.

545322309 is a deficient number, since it is larger than the sum of its proper divisors (299731131).

545322309 is a wasteful number, since it uses less digits than its factorization.

545322309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 440200.

The product of its (nonzero) digits is 32400, while the sum is 33.

The square root of 545322309 is about 23352.1371398851. The cubic root of 545322309 is about 816.9919079014.

The spelling of 545322309 in words is "five hundred forty-five million, three hundred twenty-two thousand, three hundred nine".