210135438800 has 120 divisors (see below), whose sum is σ = 587858553216. Its totient is φ = 70687019520.

The previous prime is 210135438797. The next prime is 210135438827. The reversal of 210135438800 is 8834531012.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 559604 + ... + 856403.

Almost surely, 2^210135438800 is an apocalyptic number.

210135438800 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

210135438800 is an abundant number, since it is smaller than the sum of its proper divisors (377723114416).

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

210135438800 is a wasteful number, since it uses less digits than its factorization.

210135438800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1416085 (or 1416074 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 35.

Adding to 210135438800 its reverse (8834531012), we get a palindrome (218969969812).

The spelling of 210135438800 in words is "two hundred ten billion, one hundred thirty-five million, four hundred thirty-eight thousand, eight hundred".