320643051 has 4 divisors (see below), whose sum is σ = 427524072. Its totient is φ = 213762032.

The previous prime is 320643049. The next prime is 320643061. The reversal of 320643051 is 150346023.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 320643051 - 2¹ = 320643049 is a prime.

It is not an unprimeable number, because it can be changed into a prime (320643061) 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, 53440506 + ... + 53440511.

It is an arithmetic number, because the mean of its divisors is an integer number (106881018).

Almost surely, 2^320643051 is an apocalyptic number.

320643051 is a deficient number, since it is larger than the sum of its proper divisors (106881021).

320643051 is a wasteful number, since it uses less digits than its factorization.

320643051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106881020.

The product of its (nonzero) digits is 2160, while the sum is 24.

The square root of 320643051 is about 17906.5086211690. The cubic root of 320643051 is about 684.4482395045.

Adding to 320643051 its reverse (150346023), we get a palindrome (470989074).

The spelling of 320643051 in words is "three hundred twenty million, six hundred forty-three thousand, fifty-one".