2131488720 has 120 divisors (see below), whose sum is σ = 7182311136. Its totient is φ = 566486784.

The previous prime is 2131488701. The next prime is 2131488743. The reversal of 2131488720 is 278841312.

It is a tau number, because it is divible by the number of its divisors (120).

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 216219 + ... + 225861.

Almost surely, 2^2131488720 is an apocalyptic number.

2131488720 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 2131488720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3591155568).

2131488720 is an abundant number, since it is smaller than the sum of its proper divisors (5050822416).

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

2131488720 is a wasteful number, since it uses less digits than its factorization.

2131488720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9969 (or 9960 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 36.

The square root of 2131488720 is about 46168.0486917089. The cubic root of 2131488720 is about 1286.9480402769.

The spelling of 2131488720 in words is "two billion, one hundred thirty-one million, four hundred eighty-eight thousand, seven hundred twenty".