2400031321 has 16 divisors (see below), whose sum is σ = 2588789376. Its totient is φ = 2216814336.

The previous prime is 2400031289. The next prime is 2400031331. The reversal of 2400031321 is 1231300042.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 2400031321 - 2⁵ = 2400031289 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2400031295 and 2400031304.

It is not an unprimeable number, because it can be changed into a prime (2400031331) 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, 311700 + ... + 319306.

It is an arithmetic number, because the mean of its divisors is an integer number (161799336).

Almost surely, 2^2400031321 is an apocalyptic number.

It is an amenable number.

2400031321 is a deficient number, since it is larger than the sum of its proper divisors (188758055).

2400031321 is a wasteful number, since it uses less digits than its factorization.

2400031321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7968.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 2400031321 is about 48990.1145232383. The cubic root of 2400031321 is about 1338.8717243916.

Adding to 2400031321 its reverse (1231300042), we get a palindrome (3631331363).

The spelling of 2400031321 in words is "two billion, four hundred million, thirty-one thousand, three hundred twenty-one".