505442152221 has 8 divisors (see below), whose sum is σ = 674033973984. Its totient is φ = 336905882640.

The previous prime is 505442152213. The next prime is 505442152231. The reversal of 505442152221 is 122251244505.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 505442152221 - 2³ = 505442152213 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (505442152231) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13866810 + ... + 13903211.

It is an arithmetic number, because the mean of its divisors is an integer number (84254246748).

Almost surely, 2^505442152221 is an apocalyptic number.

It is an amenable number.

505442152221 is a deficient number, since it is larger than the sum of its proper divisors (168591821763).

505442152221 is a wasteful number, since it uses less digits than its factorization.

505442152221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27776091.

The product of its (nonzero) digits is 32000, while the sum is 33.

Adding to 505442152221 its reverse (122251244505), we get a palindrome (627693396726).

The spelling of 505442152221 in words is "five hundred five billion, four hundred forty-two million, one hundred fifty-two thousand, two hundred twenty-one".