2117157388 has 24 divisors (see below), whose sum is σ = 3811870832. Its totient is φ = 1028484864.

The previous prime is 2117157377. The next prime is 2117157409. The reversal of 2117157388 is 8837517112.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34545 + ... + 73672.

Almost surely, 2^2117157388 is an apocalyptic number.

It is an amenable number.

2117157388 is a deficient number, since it is larger than the sum of its proper divisors (1694713444).

2117157388 is a wasteful number, since it uses less digits than its factorization.

2117157388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108361 (or 108359 counting only the distinct ones).

The product of its digits is 94080, while the sum is 43.

The square root of 2117157388 is about 46012.5785845566. The cubic root of 2117157388 is about 1284.0572327565.

The spelling of 2117157388 in words is "two billion, one hundred seventeen million, one hundred fifty-seven thousand, three hundred eighty-eight".