210081144 has 128 divisors (see below), whose sum is σ = 661731840. Its totient is φ = 54093312.

The previous prime is 210081139. The next prime is 210081161. The reversal of 210081144 is 441180012.

It is a happy number.

210081144 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a self number, because there is not a number n which added to its sum of digits gives 210081144.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 92794 + ... + 95030.

It is an arithmetic number, because the mean of its divisors is an integer number (5169780).

Almost surely, 2^210081144 is an apocalyptic number.

210081144 is a gapful number since it is divisible by the number (24) 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 210081144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (330865920).

210081144 is an abundant number, since it is smaller than the sum of its proper divisors (451650696).

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

210081144 is a wasteful number, since it uses less digits than its factorization.

210081144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2309 (or 2305 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 21.

The square root of 210081144 is about 14494.1762097747. The cubic root of 210081144 is about 594.4687431325.

The spelling of 210081144 in words is "two hundred ten million, eighty-one thousand, one hundred forty-four".