2151262720 has 80 divisors (see below), whose sum is σ = 5245780320. Its totient is φ = 845860864.

The previous prime is 2151262691. The next prime is 2151262741. The reversal of 2151262720 is 272621512.

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

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 143919 + ... + 158161.

It is an arithmetic number, because the mean of its divisors is an integer number (65572254).

Almost surely, 2^2151262720 is an apocalyptic number.

2151262720 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 2151262720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2622890160).

2151262720 is an abundant number, since it is smaller than the sum of its proper divisors (3094517600).

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

2151262720 is an equidigital number, since it uses as much as digits as its factorization.

2151262720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14325 (or 14309 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 28.

The square root of 2151262720 is about 46381.7067387564. The cubic root of 2151262720 is about 1290.9155049966.

The spelling of 2151262720 in words is "two billion, one hundred fifty-one million, two hundred sixty-two thousand, seven hundred twenty".