2155176725 has 18 divisors (see below), whose sum is σ = 2893808646. Its totient is φ = 1591512000.

The previous prime is 2155176713. The next prime is 2155176733. The reversal of 2155176725 is 5276715512.

It is a happy number.

It can be written as a sum of positive squares in 9 ways, for example, as 1826878564 + 328298161 = 42742^2 + 18119^2 .

It is a de Polignac number, because none of the positive numbers 2^k-2155176725 is a prime.

It is a Duffinian number.

It is a congruent 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 17 ways as a sum of consecutive naturals, for example, 250826 + ... + 259275.

It is an arithmetic number, because the mean of its divisors is an integer number (160767147).

Almost surely, 2^2155176725 is an apocalyptic number.

2155176725 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2155176725 is a deficient number, since it is larger than the sum of its proper divisors (738631921).

2155176725 is a wasteful number, since it uses less digits than its factorization.

2155176725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 510137 (or 510119 counting only the distinct ones).

The product of its digits is 147000, while the sum is 41.

The square root of 2155176725 is about 46423.8809773591. The cubic root of 2155176725 is about 1291.6979274201.

The spelling of 2155176725 in words is "two billion, one hundred fifty-five million, one hundred seventy-six thousand, seven hundred twenty-five".