545221839 has 8 divisors (see below), whose sum is σ = 727191472. Its totient is φ = 363366720.

The previous prime is 545221823. The next prime is 545221849. The reversal of 545221839 is 938122545.

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

It is not a de Polignac number, because 545221839 - 2⁴ = 545221823 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 545221797 and 545221806.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (545221819) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16822 + ... + 37059.

It is an arithmetic number, because the mean of its divisors is an integer number (90898934).

Almost surely, 2^545221839 is an apocalyptic number.

545221839 is a deficient number, since it is larger than the sum of its proper divisors (181969633).

545221839 is a wasteful number, since it uses less digits than its factorization.

545221839 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57257.

The product of its digits is 86400, while the sum is 39.

The square root of 545221839 is about 23349.9858458201. The cubic root of 545221839 is about 816.9417307143.

The spelling of 545221839 in words is "five hundred forty-five million, two hundred twenty-one thousand, eight hundred thirty-nine".