212255235564 has 24 divisors (see below), whose sum is σ = 524395288368. Its totient is φ = 66589877760.

The previous prime is 212255235503. The next prime is 212255235601. The reversal of 212255235564 is 465532552212.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 520233217 + ... + 520233624.

It is an arithmetic number, because the mean of its divisors is an integer number (21849803682).

Almost surely, 2^212255235564 is an apocalyptic number.

It is an amenable number.

212255235564 is an abundant number, since it is smaller than the sum of its proper divisors (312140052804).

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

212255235564 is a wasteful number, since it uses less digits than its factorization.

212255235564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1040466865 (or 1040466863 counting only the distinct ones).

The product of its digits is 720000, while the sum is 42.

Adding to 212255235564 its reverse (465532552212), we get a palindrome (677787787776).

The spelling of 212255235564 in words is "two hundred twelve billion, two hundred fifty-five million, two hundred thirty-five thousand, five hundred sixty-four".