2445312321 has 20 divisors (see below), whose sum is σ = 3811697472. Its totient is φ = 1559328408.

The previous prime is 2445312253. The next prime is 2445312329. The reversal of 2445312321 is 1232135442.

2445312321 is a `hidden beast` number, since 24 + 4 + 5 + 312 + 321 = 666.

It is not a de Polignac number, because 2445312321 - 2⁹ = 2445311809 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (2445312329) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 654421 + ... + 658146.

Almost surely, 2^2445312321 is an apocalyptic number.

It is an amenable number.

2445312321 is a deficient number, since it is larger than the sum of its proper divisors (1366385151).

2445312321 is a wasteful number, since it uses less digits than its factorization.

2445312321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1312602 (or 1312593 counting only the distinct ones).

The product of its digits is 5760, while the sum is 27.

The square root of 2445312321 is about 49450.0993022259. The cubic root of 2445312321 is about 1347.2394106229.

Adding to 2445312321 its reverse (1232135442), we get a palindrome (3677447763).

The spelling of 2445312321 in words is "two billion, four hundred forty-five million, three hundred twelve thousand, three hundred twenty-one".