2117519231 has 4 divisors (see below), whose sum is σ = 2117643600. Its totient is φ = 2117394864.

The previous prime is 2117519203. The next prime is 2117519273. The reversal of 2117519231 is 1329157112.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2117519231 is a prime.

It is a super-2 number, since 2×2117519231² = 8967775387309662722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2117519281) 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, 31646 + ... + 72363.

It is an arithmetic number, because the mean of its divisors is an integer number (529410900).

Almost surely, 2^2117519231 is an apocalyptic number.

2117519231 is a deficient number, since it is larger than the sum of its proper divisors (124369).

2117519231 is a wasteful number, since it uses less digits than its factorization.

2117519231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124368.

The product of its digits is 3780, while the sum is 32.

The square root of 2117519231 is about 46016.5104174578. The cubic root of 2117519231 is about 1284.1303812553.

The spelling of 2117519231 in words is "two billion, one hundred seventeen million, five hundred nineteen thousand, two hundred thirty-one".