2155635329 has 12 divisors (see below), whose sum is σ = 2283380244. Its totient is φ = 2034713952.

The previous prime is 2155635301. The next prime is 2155635341. The reversal of 2155635329 is 9235365512.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 287234704 + 1868400625 = 16948^2 + 43225^2 .

It is not a de Polignac number, because 2155635329 - 2⁸ = 2155635073 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2155635379) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 89219 + ... + 110775.

It is an arithmetic number, because the mean of its divisors is an integer number (190281687).

Almost surely, 2^2155635329 is an apocalyptic number.

It is an amenable number.

2155635329 is a deficient number, since it is larger than the sum of its proper divisors (127744915).

2155635329 is a wasteful number, since it uses less digits than its factorization.

2155635329 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21872 (or 21853 counting only the distinct ones).

The product of its digits is 243000, while the sum is 41.

The square root of 2155635329 is about 46428.8200259279. The cubic root of 2155635329 is about 1291.7895418442.

The spelling of 2155635329 in words is "two billion, one hundred fifty-five million, six hundred thirty-five thousand, three hundred twenty-nine".