2115515340 has 96 divisors (see below), whose sum is σ = 6623789760. Its totient is φ = 560521728.

The previous prime is 2115515323. The next prime is 2115515341. The reversal of 2115515340 is 435155112.

2115515340 is a `hidden beast` number, since 2 + 115 + 515 + 34 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a zygodrome in base 2.

It is not an unprimeable number, because it can be changed into a prime (2115515341) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 72304 + ... + 97256.

It is an arithmetic number, because the mean of its divisors is an integer number (68997810).

Almost surely, 2^2115515340 is an apocalyptic number.

2115515340 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 2115515340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3311894880).

2115515340 is an abundant number, since it is smaller than the sum of its proper divisors (4508274420).

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

2115515340 is a wasteful number, since it uses less digits than its factorization.

2115515340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25128 (or 25120 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 27.

The square root of 2115515340 is about 45994.7316548319. The cubic root of 2115515340 is about 1283.7251791950.

The spelling of 2115515340 in words is "two billion, one hundred fifteen million, five hundred fifteen thousand, three hundred forty".