2320728511 has 4 divisors (see below), whose sum is σ = 2320850224. Its totient is φ = 2320606800.

The previous prime is 2320728499. The next prime is 2320728559. The reversal of 2320728511 is 1158270232.

2320728511 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 2320728511 - 2¹³ = 2320720319 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2320728581) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25350 + ... + 72691.

It is an arithmetic number, because the mean of its divisors is an integer number (580212556).

Almost surely, 2^2320728511 is an apocalyptic number.

2320728511 is a deficient number, since it is larger than the sum of its proper divisors (121713).

2320728511 is an equidigital number, since it uses as much as digits as its factorization.

2320728511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121712.

The product of its (nonzero) digits is 6720, while the sum is 31.

The square root of 2320728511 is about 48173.9401647820. The cubic root of 2320728511 is about 1323.9597409514.

Adding to 2320728511 its reverse (1158270232), we get a palindrome (3478998743).

The spelling of 2320728511 in words is "two billion, three hundred twenty million, seven hundred twenty-eight thousand, five hundred eleven".