545303321421 has 4 divisors (see below), whose sum is σ = 727071095232. Its totient is φ = 363535547612.

The previous prime is 545303321393. The next prime is 545303321429. The reversal of 545303321421 is 124123303545.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 545303321421 - 2⁷ = 545303321293 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (545303321429) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 90883886901 + ... + 90883886906.

It is an arithmetic number, because the mean of its divisors is an integer number (181767773808).

Almost surely, 2^545303321421 is an apocalyptic number.

It is an amenable number.

545303321421 is a deficient number, since it is larger than the sum of its proper divisors (181767773811).

545303321421 is a wasteful number, since it uses less digits than its factorization.

545303321421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 181767773810.

The product of its (nonzero) digits is 43200, while the sum is 33.

Adding to 545303321421 its reverse (124123303545), we get a palindrome (669426624966).

The spelling of 545303321421 in words is "five hundred forty-five billion, three hundred three million, three hundred twenty-one thousand, four hundred twenty-one".