321547325405 has 4 divisors (see below), whose sum is σ = 385856790492. Its totient is φ = 257237860320.

The previous prime is 321547325383. The next prime is 321547325521. The reversal of 321547325405 is 504523745123.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 504523745123 = 157 ⋅3213527039.

It can be written as a sum of positive squares in 2 ways, for example, as 37656566809 + 283890758596 = 194053^2 + 532814^2 .

It is not a de Polignac number, because 321547325405 - 2²⁸ = 321278889949 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 3 ways as a sum of consecutive naturals, for example, 32154732536 + ... + 32154732545.

It is an arithmetic number, because the mean of its divisors is an integer number (96464197623).

Almost surely, 2^321547325405 is an apocalyptic number.

It is an amenable number.

321547325405 is a deficient number, since it is larger than the sum of its proper divisors (64309465087).

321547325405 is an equidigital number, since it uses as much as digits as its factorization.

321547325405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64309465086.

The product of its (nonzero) digits is 504000, while the sum is 41.

The spelling of 321547325405 in words is "three hundred twenty-one billion, five hundred forty-seven million, three hundred twenty-five thousand, four hundred five".