545251807 has 4 divisors (see below), whose sum is σ = 545303016. Its totient is φ = 545200600.

The previous prime is 545251801. The next prime is 545251831. The reversal of 545251807 is 708152545.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 545251807 - 2²³ = 536863199 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (545251801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2953 + ... + 33154.

It is an arithmetic number, because the mean of its divisors is an integer number (136325754).

Almost surely, 2^545251807 is an apocalyptic number.

545251807 is a deficient number, since it is larger than the sum of its proper divisors (51209).

545251807 is a wasteful number, since it uses less digits than its factorization.

545251807 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51208.

The product of its (nonzero) digits is 56000, while the sum is 37.

The square root of 545251807 is about 23350.6275504535. The cubic root of 545251807 is about 816.9566981150.

The spelling of 545251807 in words is "five hundred forty-five million, two hundred fifty-one thousand, eight hundred seven".