2151715700 has 72 divisors (see below), whose sum is σ = 4796151360. Its totient is φ = 837446400.

The previous prime is 2151715693. The next prime is 2151715729. The reversal of 2151715700 is 75171512.

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, 1336496 + ... + 1338104.

Almost surely, 2^2151715700 is an apocalyptic number.

2151715700 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 2151715700, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2398075680).

2151715700 is an abundant number, since it is smaller than the sum of its proper divisors (2644435660).

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

2151715700 is a wasteful number, since it uses less digits than its factorization.

2151715700 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1977 (or 1970 counting only the distinct ones).

The product of its (nonzero) digits is 2450, while the sum is 29.

The square root of 2151715700 is about 46386.5896569256. The cubic root of 2151715700 is about 1291.0061057186.

The spelling of 2151715700 in words is "two billion, one hundred fifty-one million, seven hundred fifteen thousand, seven hundred".