2331266721 has 16 divisors (see below), whose sum is σ = 3553225728. Its totient is φ = 1331845200.

The previous prime is 2331266719. The next prime is 2331266741. The reversal of 2331266721 is 1276621332.

It is not a de Polignac number, because 2331266721 - 2¹ = 2331266719 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2331266741) 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, 106116 + ... + 126186.

It is an arithmetic number, because the mean of its divisors is an integer number (222076608).

Almost surely, 2^2331266721 is an apocalyptic number.

2331266721 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2331266721 is a deficient number, since it is larger than the sum of its proper divisors (1221959007).

2331266721 is a wasteful number, since it uses less digits than its factorization.

2331266721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25612.

The product of its digits is 18144, while the sum is 33.

The square root of 2331266721 is about 48283.1929453718. The cubic root of 2331266721 is about 1325.9607075071.

The spelling of 2331266721 in words is "two billion, three hundred thirty-one million, two hundred sixty-six thousand, seven hundred twenty-one".