2123315240 has 64 divisors (see below), whose sum is σ = 5036636160. Its totient is φ = 804418560.

The previous prime is 2123315237. The next prime is 2123315269. The reversal of 2123315240 is 425133212.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40064 + ... + 76496.

It is an arithmetic number, because the mean of its divisors is an integer number (78697440).

Almost surely, 2^2123315240 is an apocalyptic number.

2123315240 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 2123315240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2518318080).

2123315240 is an abundant number, since it is smaller than the sum of its proper divisors (2913320920).

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

2123315240 is a wasteful number, since it uses less digits than its factorization.

2123315240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36522 (or 36518 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 2123315240 is about 46079.4448751284. Note that the first 3 decimals coincide. The cubic root of 2123315240 is about 1285.3009413904.

Adding to 2123315240 its reverse (425133212), we get a palindrome (2548448452).

The spelling of 2123315240 in words is "two billion, one hundred twenty-three million, three hundred fifteen thousand, two hundred forty".