513551303232221 has 8 divisors (see below), whose sum is σ = 513912911045184. Its totient is φ = 513189697839520.

The previous prime is 513551303232181. The next prime is 513551303232257. The reversal of 513551303232221 is 122232303155315.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 513551303232221 - 2¹⁸ = 513551302970077 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 757602281 + ... + 758279841.

It is an arithmetic number, because the mean of its divisors is an integer number (64239113880648).

Almost surely, 2^{513551303232221} is an apocalyptic number.

It is an amenable number.

513551303232221 is a deficient number, since it is larger than the sum of its proper divisors (361607812963).

513551303232221 is a wasteful number, since it uses less digits than its factorization.

513551303232221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1210131.

The product of its (nonzero) digits is 162000, while the sum is 38.

Adding to 513551303232221 its reverse (122232303155315), we get a palindrome (635783606387536).

The spelling of 513551303232221 in words is "five hundred thirteen trillion, five hundred fifty-one billion, three hundred three million, two hundred thirty-two thousand, two hundred twenty-one".