321138375513 has 8 divisors (see below), whose sum is σ = 435203918976. Its totient is φ = 210582541200.

The previous prime is 321138375479. The next prime is 321138375527. The reversal of 321138375513 is 315573831123.

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

It is not a de Polignac number, because 321138375513 - 2²¹ = 321136278361 is a prime.

It is not an unprimeable number, because it can be changed into a prime (321138375533) 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, 877427073 + ... + 877427438.

It is an arithmetic number, because the mean of its divisors is an integer number (54400489872).

Almost surely, 2^321138375513 is an apocalyptic number.

It is an amenable number.

321138375513 is a deficient number, since it is larger than the sum of its proper divisors (114065543463).

321138375513 is a wasteful number, since it uses less digits than its factorization.

321138375513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1754854575.

The product of its digits is 226800, while the sum is 42.

The spelling of 321138375513 in words is "three hundred twenty-one billion, one hundred thirty-eight million, three hundred seventy-five thousand, five hundred thirteen".