2135199517 has 20 divisors (see below), whose sum is σ = 2406666780. Its totient is φ = 1893214400.

The previous prime is 2135199497. The next prime is 2135199527. The reversal of 2135199517 is 7159915312.

It can be written as a sum of positive squares in 2 ways, for example, as 173949721 + 1961249796 = 13189^2 + 44286^2 .

It is not a de Polignac number, because 2135199517 - 2²³ = 2126810909 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 (2135199527) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 598503 + ... + 602059.

It is an arithmetic number, because the mean of its divisors is an integer number (120333339).

Almost surely, 2^2135199517 is an apocalyptic number.

It is an amenable number.

2135199517 is a deficient number, since it is larger than the sum of its proper divisors (271467263).

2135199517 is an frugal number, since it uses more digits than its factorization.

2135199517 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3642 (or 3609 counting only the distinct ones).

The product of its digits is 85050, while the sum is 43.

The square root of 2135199517 is about 46208.2191498439. The cubic root of 2135199517 is about 1287.6944410141.

The spelling of 2135199517 in words is "two billion, one hundred thirty-five million, one hundred ninety-nine thousand, five hundred seventeen".