210135422040 has 64 divisors (see below), whose sum is σ = 645066892800. Its totient is φ = 54732945792.

The previous prime is 210135422023. The next prime is 210135422071. The reversal of 210135422040 is 40224531012.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 210135422040.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20356800 + ... + 20367119.

It is an arithmetic number, because the mean of its divisors is an integer number (10079170200).

Almost surely, 2^210135422040 is an apocalyptic number.

210135422040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

210135422040 is an abundant number, since it is smaller than the sum of its proper divisors (434931470760).

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

210135422040 is a wasteful number, since it uses less digits than its factorization.

210135422040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40723976 (or 40723972 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 24.

Adding to 210135422040 its reverse (40224531012), we get a palindrome (250359953052).

The spelling of 210135422040 in words is "two hundred ten billion, one hundred thirty-five million, four hundred twenty-two thousand, forty".