2115201440 has 96 divisors (see below), whose sum is σ = 5688579456. Its totient is φ = 735708160.

The previous prime is 2115201427. The next prime is 2115201479. The reversal of 2115201440 is 441025112.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (20).

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, 14354 + ... + 66606.

It is an arithmetic number, because the mean of its divisors is an integer number (59256036).

Almost surely, 2^2115201440 is an apocalyptic number.

2115201440 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 2115201440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2844289728).

2115201440 is an abundant number, since it is smaller than the sum of its proper divisors (3573378016).

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

2115201440 is a wasteful number, since it uses less digits than its factorization.

2115201440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52302 (or 52294 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 20.

The square root of 2115201440 is about 45991.3191809063. The cubic root of 2115201440 is about 1283.6616830406.

Adding to 2115201440 its reverse (441025112), we get a palindrome (2556226552).

The spelling of 2115201440 in words is "two billion, one hundred fifteen million, two hundred one thousand, four hundred forty".