2155689325 has 12 divisors (see below), whose sum is σ = 2675724948. Its totient is φ = 1722828800.

The previous prime is 2155689323. The next prime is 2155689379. The reversal of 2155689325 is 5239865512.

2155689325 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 6 ways, for example, as 139499721 + 2016189604 = 11811^2 + 44902^2 .

It is not a de Polignac number, because 2155689325 - 2¹ = 2155689323 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 (2155689323) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17236 + ... + 67885.

It is an arithmetic number, because the mean of its divisors is an integer number (222977079).

Almost surely, 2^2155689325 is an apocalyptic number.

2155689325 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2155689325 is a deficient number, since it is larger than the sum of its proper divisors (520035623).

2155689325 is a wasteful number, since it uses less digits than its factorization.

2155689325 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86144 (or 86139 counting only the distinct ones).

The product of its digits is 648000, while the sum is 46.

The square root of 2155689325 is about 46429.4015145576. The cubic root of 2155689325 is about 1291.8003276645.

The spelling of 2155689325 in words is "two billion, one hundred fifty-five million, six hundred eighty-nine thousand, three hundred twenty-five".