513224211555221 has 8 divisors (see below), whose sum is σ = 524207308664064. Its totient is φ = 502243757489520.

The previous prime is 513224211555163. The next prime is 513224211555241. The reversal of 513224211555221 is 122555112422315.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-513224211555221 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 (513224211555241) 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, 660368270 + ... + 661144991.

It is an arithmetic number, because the mean of its divisors is an integer number (65525913583008).

Almost surely, 2^{513224211555221} is an apocalyptic number.

It is an amenable number.

513224211555221 is a deficient number, since it is larger than the sum of its proper divisors (10983097108843).

513224211555221 is a wasteful number, since it uses less digits than its factorization.

513224211555221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1321521571.

The product of its digits is 240000, while the sum is 41.

Adding to 513224211555221 its reverse (122555112422315), we get a palindrome (635779323977536).

The spelling of 513224211555221 in words is "five hundred thirteen trillion, two hundred twenty-four billion, two hundred eleven million, five hundred fifty-five thousand, two hundred twenty-one".