212818536 has 128 divisors (see below), whose sum is σ = 692294400. Its totient is φ = 59304960.

The previous prime is 212818531. The next prime is 212818537. The reversal of 212818536 is 635818212.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 212818536.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212818531) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 60276 + ... + 63708.

It is an arithmetic number, because the mean of its divisors is an integer number (5408550).

Almost surely, 2^212818536 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 212818536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (346147200).

212818536 is an abundant number, since it is smaller than the sum of its proper divisors (479475864).

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

212818536 is a wasteful number, since it uses less digits than its factorization.

212818536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3496 (or 3486 counting only the distinct ones).

The product of its digits is 23040, while the sum is 36.

The square root of 212818536 is about 14588.3013404577. The cubic root of 212818536 is about 597.0396175825.

The spelling of 212818536 in words is "two hundred twelve million, eight hundred eighteen thousand, five hundred thirty-six".