320400101 has 16 divisors (see below), whose sum is σ = 369621120. Its totient is φ = 272056320.

The previous prime is 320400077. The next prime is 320400103. The reversal of 320400101 is 101004023.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 320400101 - 2¹⁰ = 320399077 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320400103) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 433190 + ... + 433928.

It is an arithmetic number, because the mean of its divisors is an integer number (23101320).

Almost surely, 2^320400101 is an apocalyptic number.

It is an amenable number.

320400101 is a deficient number, since it is larger than the sum of its proper divisors (49221019).

320400101 is a wasteful number, since it uses less digits than its factorization.

320400101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1244.

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 320400101 is about 17899.7234894844. The cubic root of 320400101 is about 684.2753278974.

Adding to 320400101 its reverse (101004023), we get a palindrome (421404124).

The spelling of 320400101 in words is "three hundred twenty million, four hundred thousand, one hundred one".