556326351221 has 16 divisors (see below), whose sum is σ = 581390008320. Its totient is φ = 531336302640.

The previous prime is 556326351197. The next prime is 556326351227. The reversal of 556326351221 is 122153623655.

It is a cyclic number.

It is not a de Polignac number, because 556326351221 - 2¹⁰ = 556326350197 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 (556326351227) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 47369276 + ... + 47381018.

It is an arithmetic number, because the mean of its divisors is an integer number (36336875520).

Almost surely, 2^556326351221 is an apocalyptic number.

It is an amenable number.

556326351221 is a deficient number, since it is larger than the sum of its proper divisors (25063657099).

556326351221 is a wasteful number, since it uses less digits than its factorization.

556326351221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14696.

The product of its digits is 324000, while the sum is 41.

Adding to 556326351221 its reverse (122153623655), we get a palindrome (678479974876).

The spelling of 556326351221 in words is "five hundred fifty-six billion, three hundred twenty-six million, three hundred fifty-one thousand, two hundred twenty-one".