210203140 has 72 divisors (see below), whose sum is σ = 516644352. Its totient is φ = 71628480.

The previous prime is 210203111. The next prime is 210203159. The reversal of 210203140 is 41302012.

It is a self number, because there is not a number n which added to its sum of digits gives 210203140.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 186619 + ... + 187741.

It is an arithmetic number, because the mean of its divisors is an integer number (7175616).

Almost surely, 2^210203140 is an apocalyptic number.

210203140 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 210203140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (258322176).

210203140 is an abundant number, since it is smaller than the sum of its proper divisors (306441212).

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

210203140 is a wasteful number, since it uses less digits than its factorization.

210203140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1337 (or 1328 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 210203140 is about 14498.3840478862. The cubic root of 210203140 is about 594.5837919715.

Adding to 210203140 its reverse (41302012), we get a palindrome (251505152).

The spelling of 210203140 in words is "two hundred ten million, two hundred three thousand, one hundred forty".