321225551056351 has 4 divisors (see below), whose sum is σ = 321225587107992. Its totient is φ = 321225515004712.

The previous prime is 321225551056283. The next prime is 321225551056363. The reversal of 321225551056351 is 153650155522123.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 321225551056351 - 2⁹ = 321225551055839 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 (321225551056951) 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, 6125796 + ... + 26076358.

It is an arithmetic number, because the mean of its divisors is an integer number (80306396776998).

Almost surely, 2^{321225551056351} is an apocalyptic number.

321225551056351 is a deficient number, since it is larger than the sum of its proper divisors (36051641).

321225551056351 is a wasteful number, since it uses less digits than its factorization.

321225551056351 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36051640.

The product of its (nonzero) digits is 1350000, while the sum is 46.

The spelling of 321225551056351 in words is "three hundred twenty-one trillion, two hundred twenty-five billion, five hundred fifty-one million, fifty-six thousand, three hundred fifty-one".