500955221 has 4 divisors (see below), whose sum is σ = 539490252. Its totient is φ = 462420192.

The previous prime is 500955211. The next prime is 500955227. The reversal of 500955221 is 122559005.

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 59367025 + 441588196 = 7705^2 + 21014^2 .

It is a de Polignac number, because none of the positive numbers 2^k-500955221 is a prime.

It is a super-2 number, since 2×500955221² = 501912266894317682, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (500955227) 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, 19267496 + ... + 19267521.

It is an arithmetic number, because the mean of its divisors is an integer number (134872563).

Almost surely, 2^500955221 is an apocalyptic number.

It is an amenable number.

500955221 is a deficient number, since it is larger than the sum of its proper divisors (38535031).

500955221 is a wasteful number, since it uses less digits than its factorization.

500955221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38535030.

The product of its (nonzero) digits is 4500, while the sum is 29.

The square root of 500955221 is about 22382.0289741569. The cubic root of 500955221 is about 794.2056440610.

The spelling of 500955221 in words is "five hundred million, nine hundred fifty-five thousand, two hundred twenty-one".