2135805601 has 4 divisors (see below), whose sum is σ = 2209454100. Its totient is φ = 2062157104.

The previous prime is 2135805589. The next prime is 2135805619. The reversal of 2135805601 is 1065085312.

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

It can be written as a sum of positive squares in 2 ways, for example, as 915002001 + 1220803600 = 30249^2 + 34940^2 .

It is a cyclic number.

It is not a de Polignac number, because 2135805601 - 2²¹ = 2133708449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2135805671) 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, 36824206 + ... + 36824263.

It is an arithmetic number, because the mean of its divisors is an integer number (552363525).

Almost surely, 2^2135805601 is an apocalyptic number.

It is an amenable number.

2135805601 is a deficient number, since it is larger than the sum of its proper divisors (73648499).

2135805601 is an equidigital number, since it uses as much as digits as its factorization.

2135805601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73648498.

The product of its (nonzero) digits is 7200, while the sum is 31.

The square root of 2135805601 is about 46214.7768684433. The cubic root of 2135805601 is about 1287.8162683747.

The spelling of 2135805601 in words is "two billion, one hundred thirty-five million, eight hundred five thousand, six hundred one".