320201231 has 12 divisors (see below), whose sum is σ = 373265640. Its totient is φ = 273878640.

The previous prime is 320201221. The next prime is 320201237. The reversal of 320201231 is 132102023.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-320201231 is a prime.

It is a super-2 number, since 2×320201231² = 205057656667830722, 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 (320201237) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17405 + ... + 30713.

It is an arithmetic number, because the mean of its divisors is an integer number (31105470).

Almost surely, 2^320201231 is an apocalyptic number.

320201231 is a deficient number, since it is larger than the sum of its proper divisors (53064409).

320201231 is a wasteful number, since it uses less digits than its factorization.

320201231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13814 (or 13807 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 320201231 is about 17894.1675134665. The cubic root of 320201231 is about 684.1337236982.

Adding to 320201231 its reverse (132102023), we get a palindrome (452303254).

The spelling of 320201231 in words is "three hundred twenty million, two hundred one thousand, two hundred thirty-one".