320201311 has 4 divisors (see below), whose sum is σ = 321599800. Its totient is φ = 318802824.

The previous prime is 320201309. The next prime is 320201317. The reversal of 320201311 is 113102023.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 113102023 = 241 ⋅469303.

It is a cyclic number.

It is not a de Polignac number, because 320201311 - 2¹ = 320201309 is a prime.

It is a super-2 number, since 2×320201311² = 205057759132237442, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 320201291 and 320201300.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320201317) 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, 698901 + ... + 699358.

It is an arithmetic number, because the mean of its divisors is an integer number (80399950).

Almost surely, 2^320201311 is an apocalyptic number.

320201311 is a deficient number, since it is larger than the sum of its proper divisors (1398489).

320201311 is a wasteful number, since it uses less digits than its factorization.

320201311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1398488.

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 320201311 is about 17894.1697488316. The cubic root of 320201311 is about 684.1337806735.

Adding to 320201311 its reverse (113102023), we get a palindrome (433303334).

The spelling of 320201311 in words is "three hundred twenty million, two hundred one thousand, three hundred eleven".