2155032105 has 16 divisors (see below), whose sum is σ = 3449986560. Its totient is φ = 1148705408.

The previous prime is 2155032071. The next prime is 2155032151. The reversal of 2155032105 is 5012305512.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 2155032105 - 2¹² = 2155028009 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12060 + ... + 66749.

It is an arithmetic number, because the mean of its divisors is an integer number (215624160).

Almost surely, 2^2155032105 is an apocalyptic number.

It is an amenable number.

2155032105 is a deficient number, since it is larger than the sum of its proper divisors (1294954455).

2155032105 is a wasteful number, since it uses less digits than its factorization.

2155032105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80640.

The product of its (nonzero) digits is 1500, while the sum is 24.

The square root of 2155032105 is about 46422.3233477171. The cubic root of 2155032105 is about 1291.6690342701.

Adding to 2155032105 its reverse (5012305512), we get a palindrome (7167337617).

The spelling of 2155032105 in words is "two billion, one hundred fifty-five million, thirty-two thousand, one hundred five".