320100343081 has 4 divisors (see below), whose sum is σ = 327907668564. Its totient is φ = 312293017600.

The previous prime is 320100343061. The next prime is 320100343097. The reversal of 320100343081 is 180343001023.

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 118776729600 + 201323613481 = 344640^2 + 448691^2 .

It is a cyclic number.

It is not a de Polignac number, because 320100343081 - 2²⁵ = 320066788649 is a prime.

It is a super-2 number, since 2×320100343081² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (320100343001) 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, 3903662680 + ... + 3903662761.

It is an arithmetic number, because the mean of its divisors is an integer number (81976917141).

Almost surely, 2^320100343081 is an apocalyptic number.

It is an amenable number.

320100343081 is a deficient number, since it is larger than the sum of its proper divisors (7807325483).

320100343081 is an equidigital number, since it uses as much as digits as its factorization.

320100343081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7807325482.

The product of its (nonzero) digits is 1728, while the sum is 25.

The spelling of 320100343081 in words is "three hundred twenty billion, one hundred million, three hundred forty-three thousand, eighty-one".