2180256172 has 6 divisors (see below), whose sum is σ = 3815448308. Its totient is φ = 1090128084.

The previous prime is 2180256167. The next prime is 2180256193. The reversal of 2180256172 is 2716520812.

It is a happy 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 as a sum of consecutive naturals, namely, 272532018 + ... + 272532025.

Almost surely, 2^2180256172 is an apocalyptic number.

It is an amenable number.

2180256172 is a deficient number, since it is larger than the sum of its proper divisors (1635192136).

2180256172 is a wasteful number, since it uses less digits than its factorization.

2180256172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 545064047 (or 545064045 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 34.

The square root of 2180256172 is about 46693.2133398420. The cubic root of 2180256172 is about 1296.6890443451.

Adding to 2180256172 its reverse (2716520812), we get a palindrome (4896776984).

The spelling of 2180256172 in words is "two billion, one hundred eighty million, two hundred fifty-six thousand, one hundred seventy-two".