2321151440 has 80 divisors (see below), whose sum is σ = 5783254848. Its totient is φ = 863275008.

The previous prime is 2321151439. The next prime is 2321151449. The reversal of 2321151440 is 441511232.

2321151440 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2321151449) 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, 102599 + ... + 123161.

Almost surely, 2^2321151440 is an apocalyptic number.

2321151440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2321151440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2891627424).

2321151440 is an abundant number, since it is smaller than the sum of its proper divisors (3462103408).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2321151440 is a wasteful number, since it uses less digits than its factorization.

2321151440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20676 (or 20670 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 2321151440 is about 48178.3295683858. The cubic root of 2321151440 is about 1324.0401621002.

Adding to 2321151440 its reverse (441511232), we get a palindrome (2762662672).

The spelling of 2321151440 in words is "two billion, three hundred twenty-one million, one hundred fifty-one thousand, four hundred forty".