505560236221 has 4 divisors (see below), whose sum is σ = 507482518752. Its totient is φ = 503637953692.

The previous prime is 505560236213. The next prime is 505560236231. The reversal of 505560236221 is 122632065505.

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 a cyclic number.

It is not a de Polignac number, because 505560236221 - 2³ = 505560236213 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 (505560236231) 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, 961140871 + ... + 961141396.

It is an arithmetic number, because the mean of its divisors is an integer number (126870629688).

Almost surely, 2^505560236221 is an apocalyptic number.

It is an amenable number.

505560236221 is a deficient number, since it is larger than the sum of its proper divisors (1922282531).

505560236221 is a wasteful number, since it uses less digits than its factorization.

505560236221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1922282530.

The product of its (nonzero) digits is 108000, while the sum is 37.

The spelling of 505560236221 in words is "five hundred five billion, five hundred sixty million, two hundred thirty-six thousand, two hundred twenty-one".