2155025101 has 4 divisors (see below), whose sum is σ = 2160897472. Its totient is φ = 2149152732.

The previous prime is 2155025071. The next prime is 2155025107. The reversal of 2155025101 is 1015205512.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2155025101 - 2¹¹ = 2155023053 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 (2155025107) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 2935635 + ... + 2936368.

It is an arithmetic number, because the mean of its divisors is an integer number (540224368).

Almost surely, 2^2155025101 is an apocalyptic number.

It is an amenable number.

2155025101 is a deficient number, since it is larger than the sum of its proper divisors (5872371).

2155025101 is an equidigital number, since it uses as much as digits as its factorization.

2155025101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5872370.

The product of its (nonzero) digits is 500, while the sum is 22.

The square root of 2155025101 is about 46422.2479098115. The cubic root of 2155025101 is about 1291.6676349314.

The spelling of 2155025101 in words is "two billion, one hundred fifty-five million, twenty-five thousand, one hundred one".