2320321545 has 20 divisors (see below), whose sum is σ = 4159391940. Its totient is φ = 1237504608.

The previous prime is 2320321543. The next prime is 2320321583. The reversal of 2320321545 is 5451230232.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 282340809 + 2037980736 = 16803^2 + 45144^2 .

It is not a de Polignac number, because 2320321545 - 2¹ = 2320321543 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 (2320321543) 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, 2864190 + ... + 2864999.

It is an arithmetic number, because the mean of its divisors is an integer number (207969597).

Almost surely, 2^2320321545 is an apocalyptic number.

It is an amenable number.

2320321545 is a deficient number, since it is larger than the sum of its proper divisors (1839070395).

2320321545 is an equidigital number, since it uses as much as digits as its factorization.

2320321545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5729206 (or 5729197 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 27.

The square root of 2320321545 is about 48169.7160568754. The cubic root of 2320321545 is about 1323.8823459875.

Adding to 2320321545 its reverse (5451230232), we get a palindrome (7771551777).

The spelling of 2320321545 in words is "two billion, three hundred twenty million, three hundred twenty-one thousand, five hundred forty-five".