320250065 has 4 divisors (see below), whose sum is σ = 384300084. Its totient is φ = 256200048.

The previous prime is 320250041. The next prime is 320250071. The reversal of 320250065 is 560052023.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 560052023 = 787 ⋅711629.

It can be written as a sum of positive squares in 2 ways, for example, as 226683136 + 93566929 = 15056^2 + 9673^2 .

It is a cyclic number.

It is not a de Polignac number, because 320250065 - 2¹⁴ = 320233681 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 320250065.

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, 32025002 + ... + 32025011.

It is an arithmetic number, because the mean of its divisors is an integer number (96075021).

Almost surely, 2^320250065 is an apocalyptic number.

It is an amenable number.

320250065 is a deficient number, since it is larger than the sum of its proper divisors (64050019).

320250065 is an equidigital number, since it uses as much as digits as its factorization.

320250065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64050018.

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

The square root of 320250065 is about 17895.5319842691. The cubic root of 320250065 is about 684.1685010869.

The spelling of 320250065 in words is "three hundred twenty million, two hundred fifty thousand, sixty-five".