2179317240 has 96 divisors (see below), whose sum is σ = 7104567600. Its totient is φ = 579363840.

The previous prime is 2179317187. The next prime is 2179317247. The reversal of 2179317240 is 427139712.

It is a super-2 number, since 2×2179317240² = 9498847265122435200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 2179317195 and 2179317204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2179317247) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 110016 + ... + 128304.

Almost surely, 2^2179317240 is an apocalyptic number.

2179317240 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 2179317240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3552283800).

2179317240 is an abundant number, since it is smaller than the sum of its proper divisors (4925250360).

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

2179317240 is a wasteful number, since it uses less digits than its factorization.

2179317240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18637 (or 18630 counting only the distinct ones).

The product of its (nonzero) digits is 21168, while the sum is 36.

The square root of 2179317240 is about 46683.1579908643. The cubic root of 2179317240 is about 1296.5028769780.

The spelling of 2179317240 in words is "two billion, one hundred seventy-nine million, three hundred seventeen thousand, two hundred forty".