320665141 has 4 divisors (see below), whose sum is σ = 328486284. Its totient is φ = 312844000.

The previous prime is 320665139. The next prime is 320665153. The reversal of 320665141 is 141566023.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 141566023 = 29 ⋅4881587.

It can be written as a sum of positive squares in 2 ways, for example, as 155002500 + 165662641 = 12450^2 + 12871^2 .

It is a cyclic number.

It is not a de Polignac number, because 320665141 - 2¹ = 320665139 is a prime.

It is a super-2 number, since 2×320665141² = 205652265305099762, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320665841) 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, 3910510 + ... + 3910591.

It is an arithmetic number, because the mean of its divisors is an integer number (82121571).

Almost surely, 2^320665141 is an apocalyptic number.

It is an amenable number.

320665141 is a deficient number, since it is larger than the sum of its proper divisors (7821143).

320665141 is an equidigital number, since it uses as much as digits as its factorization.

320665141 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7821142.

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 320665141 is about 17907.1254253719. The cubic root of 320665141 is about 684.4639569972.

The spelling of 320665141 in words is "three hundred twenty million, six hundred sixty-five thousand, one hundred forty-one".