2115501078 has 16 divisors (see below), whose sum is σ = 4453686720. Its totient is φ = 668052936.

The previous prime is 2115501071. The next prime is 2115501079. The reversal of 2115501078 is 8701055112.

It is a super-2 number, since 2×2115501078² = 8950689622038324168, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2115501071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9278400 + ... + 9278627.

It is an arithmetic number, because the mean of its divisors is an integer number (278355420).

Almost surely, 2^2115501078 is an apocalyptic number.

2115501078 is an abundant number, since it is smaller than the sum of its proper divisors (2338185642).

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

2115501078 is a wasteful number, since it uses less digits than its factorization.

2115501078 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18557051.

The product of its (nonzero) digits is 2800, while the sum is 30.

The square root of 2115501078 is about 45994.5766150750. The cubic root of 2115501078 is about 1283.7222943929.

The spelling of 2115501078 in words is "two billion, one hundred fifteen million, five hundred one thousand, seventy-eight".