212031556630 has 16 divisors (see below), whose sum is σ = 381690453744. Its totient is φ = 84805144480.

The previous prime is 212031556547. The next prime is 212031556637. The reversal of 212031556630 is 36655130212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212031556637) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 814957 + ... + 1043176.

It is an arithmetic number, because the mean of its divisors is an integer number (23855653359).

Almost surely, 2^212031556630 is an apocalyptic number.

212031556630 is a deficient number, since it is larger than the sum of its proper divisors (169658897114).

212031556630 is a wasteful number, since it uses less digits than its factorization.

212031556630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1869551.

The product of its (nonzero) digits is 32400, while the sum is 34.

Adding to 212031556630 its reverse (36655130212), we get a palindrome (248686686842).

The spelling of 212031556630 in words is "two hundred twelve billion, thirty-one million, five hundred fifty-six thousand, six hundred thirty".