320564231 has 8 divisors (see below), whose sum is σ = 357127680. Its totient is φ = 285701472.

The previous prime is 320564227. The next prime is 320564249. The reversal of 320564231 is 132465023.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 320564231 - 2² = 320564227 is a prime.

It is a super-2 number, since 2×320564231² = 205522852393242722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 320564231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320564131) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 424775 + ... + 425528.

It is an arithmetic number, because the mean of its divisors is an integer number (44640960).

Almost surely, 2^320564231 is an apocalyptic number.

320564231 is a deficient number, since it is larger than the sum of its proper divisors (36563449).

320564231 is a wasteful number, since it uses less digits than its factorization.

320564231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 850345.

The product of its (nonzero) digits is 4320, while the sum is 26.

The square root of 320564231 is about 17904.3076101814. The cubic root of 320564231 is about 684.3921515575.

The spelling of 320564231 in words is "three hundred twenty million, five hundred sixty-four thousand, two hundred thirty-one".