2115391600 has 240 divisors, whose sum is σ = 6476371200. Its totient is φ = 646410240.

The previous prime is 2115391567. The next prime is 2115391643. The reversal of 2115391600 is 61935112.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 903231 + ... + 905569.

It is an arithmetic number, because the mean of its divisors is an integer number (26984880).

Almost surely, 2^2115391600 is an apocalyptic number.

2115391600 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 2115391600, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3238185600).

2115391600 is an abundant number, since it is smaller than the sum of its proper divisors (4360979600).

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

2115391600 is a wasteful number, since it uses less digits than its factorization.

2115391600 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2400 (or 2389 counting only the distinct ones).

The product of its (nonzero) digits is 1620, while the sum is 28.

The square root of 2115391600 is about 45993.3864811018. The cubic root of 2115391600 is about 1283.7001496356.

The spelling of 2115391600 in words is "two billion, one hundred fifteen million, three hundred ninety-one thousand, six hundred".