2140181172 has 18 divisors (see below), whose sum is σ = 5409902498. Its totient is φ = 713393712.

The previous prime is 2140181149. The next prime is 2140181177. The reversal of 2140181172 is 2711810412.

2140181172 is digitally balanced in base 4, 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 only one way, i.e., 1622800656 + 517380516 = 40284^2 + 22746^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2140181177) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 29724703 + ... + 29724774.

Almost surely, 2^2140181172 is an apocalyptic number.

It is an amenable number.

2140181172 is an abundant number, since it is smaller than the sum of its proper divisors (3269721326).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2140181172 is a wasteful number, since it uses less digits than its factorization.

2140181172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59449487 (or 59449482 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 27.

The square root of 2140181172 is about 46262.0921705882. The cubic root of 2140181172 is about 1288.6951073853.

Adding to 2140181172 its reverse (2711810412), we get a palindrome (4851991584).

The spelling of 2140181172 in words is "two billion, one hundred forty million, one hundred eighty-one thousand, one hundred seventy-two".