2381916871 has 4 divisors (see below), whose sum is σ = 2382015712. Its totient is φ = 2381818032.

The previous prime is 2381916833. The next prime is 2381916883. The reversal of 2381916871 is 1786191832.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2381916871 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2381916811) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13051 + ... + 70243.

It is an arithmetic number, because the mean of its divisors is an integer number (595503928).

Almost surely, 2^2381916871 is an apocalyptic number.

2381916871 is a deficient number, since it is larger than the sum of its proper divisors (98841).

2381916871 is an equidigital number, since it uses as much as digits as its factorization.

2381916871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98840.

The product of its digits is 145152, while the sum is 46.

The square root of 2381916871 is about 48804.8857287874. The cubic root of 2381916871 is about 1335.4947963661.

The spelling of 2381916871 in words is "two billion, three hundred eighty-one million, nine hundred sixteen thousand, eight hundred seventy-one".