321053405 has 4 divisors (see below), whose sum is σ = 385264092. Its totient is φ = 256842720.

The previous prime is 321053387. The next prime is 321053419. The reversal of 321053405 is 504350123.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 504350123 = 1297 ⋅388859.

It can be written as a sum of positive squares in 2 ways, for example, as 241522681 + 79530724 = 15541^2 + 8918^2 .

It is not a de Polignac number, because 321053405 - 2⁸ = 321053149 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, 32105336 + ... + 32105345.

It is an arithmetic number, because the mean of its divisors is an integer number (96316023).

Almost surely, 2^321053405 is an apocalyptic number.

It is an amenable number.

321053405 is a deficient number, since it is larger than the sum of its proper divisors (64210687).

321053405 is an equidigital number, since it uses as much as digits as its factorization.

321053405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64210686.

The product of its (nonzero) digits is 1800, while the sum is 23.

The square root of 321053405 is about 17917.9631933990. The cubic root of 321053405 is about 684.7400971128.

The spelling of 321053405 in words is "three hundred twenty-one million, fifty-three thousand, four hundred five".