621160205 has 4 divisors (see below), whose sum is σ = 745392252. Its totient is φ = 496928160.

The previous prime is 621160171. The next prime is 621160207. The reversal of 621160205 is 502061126.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 282710596 + 338449609 = 16814^2 + 18397^2 .

It is not a de Polignac number, because 621160205 - 2¹⁰ = 621159181 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (621160207) 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, 62116016 + ... + 62116025.

It is an arithmetic number, because the mean of its divisors is an integer number (186348063).

Almost surely, 2^621160205 is an apocalyptic number.

It is an amenable number.

621160205 is a deficient number, since it is larger than the sum of its proper divisors (124232047).

621160205 is a wasteful number, since it uses less digits than its factorization.

621160205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124232046.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 621160205 is about 24923.0857840678. The cubic root of 621160205 is about 853.2334534622.

The spelling of 621160205 in words is "six hundred twenty-one million, one hundred sixty thousand, two hundred five".