212205342256 has 20 divisors (see below), whose sum is σ = 432787211800. Its totient is φ = 100518319872.

The previous prime is 212205342241. The next prime is 212205342257. The reversal of 212205342256 is 652243502212.

It is a super-2 number, since 2×212205342256² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (212205342257) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 349021641 + ... + 349022248.

It is an arithmetic number, because the mean of its divisors is an integer number (21639360590).

Almost surely, 2^212205342256 is an apocalyptic number.

It is an amenable number.

212205342256 is an abundant number, since it is smaller than the sum of its proper divisors (220581869544).

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

212205342256 is a wasteful number, since it uses less digits than its factorization.

212205342256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 698043916 (or 698043910 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 34.

Adding to 212205342256 its reverse (652243502212), we get a palindrome (864448844468).

The spelling of 212205342256 in words is "two hundred twelve billion, two hundred five million, three hundred forty-two thousand, two hundred fifty-six".