212800371630 has 128 divisors (see below), whose sum is σ = 636943979520. Its totient is φ = 44204298240.

The previous prime is 212800371601. The next prime is 212800371631. The reversal of 212800371630 is 36173008212.

It is a super-2 number, since 2×212800371630² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a junction number, because it is equal to n+sod(n) for n = 212800371591 and 212800371600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212800371631) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 8342536 + ... + 8368004.

It is an arithmetic number, because the mean of its divisors is an integer number (4976124840).

Almost surely, 2^212800371630 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 212800371630, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (318471989760).

212800371630 is an abundant number, since it is smaller than the sum of its proper divisors (424143607890).

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

212800371630 is a wasteful number, since it uses less digits than its factorization.

212800371630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29114.

The product of its (nonzero) digits is 12096, while the sum is 33.

Adding to 212800371630 its reverse (36173008212), we get a palindrome (248973379842).

The spelling of 212800371630 in words is "two hundred twelve billion, eight hundred million, three hundred seventy-one thousand, six hundred thirty".