545502621 has 4 divisors (see below), whose sum is σ = 727336832. Its totient is φ = 363668412.

The previous prime is 545502619. The next prime is 545502637. The reversal of 545502621 is 126205545.

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 not a de Polignac number, because 545502621 - 2¹ = 545502619 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 (545502611) 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, 90917101 + ... + 90917106.

It is an arithmetic number, because the mean of its divisors is an integer number (181834208).

Almost surely, 2^545502621 is an apocalyptic number.

It is an amenable number.

545502621 is a deficient number, since it is larger than the sum of its proper divisors (181834211).

545502621 is a wasteful number, since it uses less digits than its factorization.

545502621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 181834210.

The product of its (nonzero) digits is 12000, while the sum is 30.

The square root of 545502621 is about 23355.9975381057. The cubic root of 545502621 is about 817.0819446918.

The spelling of 545502621 in words is "five hundred forty-five million, five hundred two thousand, six hundred twenty-one".