2115771385 has 32 divisors (see below), whose sum is σ = 3130912512. Its totient is φ = 1336608000.

The previous prime is 2115771347. The next prime is 2115771439. The reversal of 2115771385 is 5831775112.

It is not a de Polignac number, because 2115771385 - 2¹⁵ = 2115738617 is a prime.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 244635 + ... + 253135.

It is an arithmetic number, because the mean of its divisors is an integer number (97841016).

Almost surely, 2^2115771385 is an apocalyptic number.

It is an amenable number.

2115771385 is a deficient number, since it is larger than the sum of its proper divisors (1015141127).

2115771385 is a wasteful number, since it uses less digits than its factorization.

2115771385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9073.

The product of its digits is 58800, while the sum is 40.

The square root of 2115771385 is about 45997.5149872251. The cubic root of 2115771385 is about 1283.7769677037.

The spelling of 2115771385 in words is "two billion, one hundred fifteen million, seven hundred seventy-one thousand, three hundred eighty-five".