320232556401 has 4 divisors (see below), whose sum is σ = 426976741872. Its totient is φ = 213488370932.

The previous prime is 320232556363. The next prime is 320232556403. The reversal of 320232556401 is 104655232023.

It is a happy number.

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 320232556401 - 2¹⁷ = 320232425329 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (320232556403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53372092731 + ... + 53372092736.

It is an arithmetic number, because the mean of its divisors is an integer number (106744185468).

Almost surely, 2^320232556401 is an apocalyptic number.

It is an amenable number.

320232556401 is a deficient number, since it is larger than the sum of its proper divisors (106744185471).

320232556401 is a wasteful number, since it uses less digits than its factorization.

320232556401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106744185470.

The product of its (nonzero) digits is 43200, while the sum is 33.

Adding to 320232556401 its reverse (104655232023), we get a palindrome (424887788424).

The spelling of 320232556401 in words is "three hundred twenty billion, two hundred thirty-two million, five hundred fifty-six thousand, four hundred one".