2131672517 has 8 divisors (see below), whose sum is σ = 2430685656. Its totient is φ = 1851950592.

The previous prime is 2131672507. The next prime is 2131672531. The reversal of 2131672517 is 7152761312.

It can be written as a sum of positive squares in 4 ways, for example, as 414896161 + 1716776356 = 20369^2 + 41434^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2131672517 - 2¹² = 2131668421 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 (2131672507) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4822568 + ... + 4823009.

It is an arithmetic number, because the mean of its divisors is an integer number (303835707).

Almost surely, 2^2131672517 is an apocalyptic number.

It is an amenable number.

2131672517 is a deficient number, since it is larger than the sum of its proper divisors (299013139).

2131672517 is a wasteful number, since it uses less digits than its factorization.

2131672517 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9645607.

The product of its digits is 17640, while the sum is 35.

The square root of 2131672517 is about 46170.0391704404. The cubic root of 2131672517 is about 1286.9850301341.

The spelling of 2131672517 in words is "two billion, one hundred thirty-one million, six hundred seventy-two thousand, five hundred seventeen".