2189115515 has 4 divisors (see below), whose sum is σ = 2626938624. Its totient is φ = 1751292408.

The previous prime is 2189115491. The next prime is 2189115529. The reversal of 2189115515 is 5155119812.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2189115515 - 2⁶ = 2189115451 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 218911547 + ... + 218911556.

It is an arithmetic number, because the mean of its divisors is an integer number (656734656).

Almost surely, 2^2189115515 is an apocalyptic number.

2189115515 is a deficient number, since it is larger than the sum of its proper divisors (437823109).

2189115515 is an equidigital number, since it uses as much as digits as its factorization.

2189115515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 437823108.

The product of its digits is 18000, while the sum is 38.

The square root of 2189115515 is about 46787.9847289878. The cubic root of 2189115515 is about 1298.4430107167.

The spelling of 2189115515 in words is "two billion, one hundred eighty-nine million, one hundred fifteen thousand, five hundred fifteen".