320557201 has 4 divisors (see below), whose sum is σ = 320888304. Its totient is φ = 320226100.

The previous prime is 320557199. The next prime is 320557231. The reversal of 320557201 is 102755023.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 320557201 - 2¹ = 320557199 is a prime.

It is a super-2 number, since 2×320557201² = 205513838225908802, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (320557231) 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, 164095 + ... + 166036.

It is an arithmetic number, because the mean of its divisors is an integer number (80222076).

Almost surely, 2^320557201 is an apocalyptic number.

It is an amenable number.

320557201 is a deficient number, since it is larger than the sum of its proper divisors (331103).

320557201 is an equidigital number, since it uses as much as digits as its factorization.

320557201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 331102.

The product of its (nonzero) digits is 2100, while the sum is 25.

The square root of 320557201 is about 17904.1112876345. Note that the first 3 decimals coincide. The cubic root of 320557201 is about 684.3871485955.

It can be divided in two parts, 3205 and 57201, that added together give a palindrome (60406).

The spelling of 320557201 in words is "three hundred twenty million, five hundred fifty-seven thousand, two hundred one".