2175136240 has 80 divisors (see below), whose sum is σ = 5155527168. Its totient is φ = 853256448.

The previous prime is 2175136219. The next prime is 2175136241. The reversal of 2175136240 is 426315712.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×2175136240² = 9462435325122675200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2175136241) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1408909 + ... + 1410451.

Almost surely, 2^2175136240 is an apocalyptic number.

2175136240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2175136240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2577763584).

2175136240 is an abundant number, since it is smaller than the sum of its proper divisors (2980390928).

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

2175136240 is a wasteful number, since it uses less digits than its factorization.

2175136240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1886 (or 1880 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 31.

The square root of 2175136240 is about 46638.3558886889. The cubic root of 2175136240 is about 1295.6732366002.

The spelling of 2175136240 in words is "two billion, one hundred seventy-five million, one hundred thirty-six thousand, two hundred forty".