210532140 has 144 divisors (see below), whose sum is σ = 786047808. Its totient is φ = 44416512.

The previous prime is 210532139. The next prime is 210532151. The reversal of 210532140 is 41235012.

210532140 is digitally balanced in base 2, 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 (18).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 9954 + ... + 22806.

Almost surely, 2^210532140 is an apocalyptic number.

210532140 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 210532140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (393023904).

210532140 is an abundant number, since it is smaller than the sum of its proper divisors (575515668).

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

210532140 is a wasteful number, since it uses less digits than its factorization.

210532140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12888 (or 12883 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 210532140 is about 14509.7257038167. The cubic root of 210532140 is about 594.8938350705.

Adding to 210532140 its reverse (41235012), we get a palindrome (251767152).

The spelling of 210532140 in words is "two hundred ten million, five hundred thirty-two thousand, one hundred forty".