2115729193 has 4 divisors (see below), whose sum is σ = 2115833940. Its totient is φ = 2115624448.

The previous prime is 2115729181. The next prime is 2115729229. The reversal of 2115729193 is 3919275112.

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 can be written as a sum of positive squares in 2 ways, for example, as 1012957929 + 1102771264 = 31827^2 + 33208^2 .

It is a cyclic number.

It is not a de Polignac number, because 2115729193 - 2²⁵ = 2082174761 is a prime.

It is a super-2 number, since 2×2115729193² = 8952620036224862498, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2115729103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11380 + ... + 66037.

It is an arithmetic number, because the mean of its divisors is an integer number (528958485).

Almost surely, 2^2115729193 is an apocalyptic number.

It is an amenable number.

2115729193 is a deficient number, since it is larger than the sum of its proper divisors (104747).

2115729193 is an equidigital number, since it uses as much as digits as its factorization.

2115729193 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104746.

The product of its digits is 34020, while the sum is 40.

The square root of 2115729193 is about 45997.0563514667. The cubic root of 2115729193 is about 1283.7684340977.

The spelling of 2115729193 in words is "two billion, one hundred fifteen million, seven hundred twenty-nine thousand, one hundred ninety-three".