2156723700 has 288 divisors, whose sum is σ = 6884559360. Its totient is φ = 519168000.

The previous prime is 2156723693. The next prime is 2156723711. The reversal of 2156723700 is 73276512.

2156723700 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 21353650 + ... + 21353750.

It is an arithmetic number, because the mean of its divisors is an integer number (23904720).

Almost surely, 2^2156723700 is an apocalyptic number.

2156723700 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 2156723700, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3442279680).

2156723700 is an abundant number, since it is smaller than the sum of its proper divisors (4727835660).

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

2156723700 is a wasteful number, since it uses less digits than its factorization.

2156723700 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 267 (or 260 counting only the distinct ones).

The product of its (nonzero) digits is 17640, while the sum is 33.

The square root of 2156723700 is about 46440.5394025522. The cubic root of 2156723700 is about 1292.0069115919.

The spelling of 2156723700 in words is "two billion, one hundred fifty-six million, seven hundred twenty-three thousand, seven hundred".