321330380852557 has 4 divisors (see below), whose sum is σ = 332410738813020. Its totient is φ = 310250022892096.

The previous prime is 321330380852531. The next prime is 321330380852563. The reversal of 321330380852557 is 755258083033123.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 205739262580996 + 115591118271561 = 14343614^2 + 10751331^2 .

It is a cyclic number.

It is not a de Polignac number, because 321330380852557 - 2²³ = 321330372463949 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 321330380852498 and 321330380852507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321330380852587) 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, 5540178980188 + ... + 5540178980245.

It is an arithmetic number, because the mean of its divisors is an integer number (83102684703255).

Almost surely, 2^{321330380852557} is an apocalyptic number.

It is an amenable number.

321330380852557 is a deficient number, since it is larger than the sum of its proper divisors (11080357960463).

321330380852557 is a wasteful number, since it uses less digits than its factorization.

321330380852557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11080357960462.

The product of its (nonzero) digits is 18144000, while the sum is 55.

The spelling of 321330380852557 in words is "three hundred twenty-one trillion, three hundred thirty billion, three hundred eighty million, eight hundred fifty-two thousand, five hundred fifty-seven".