212231601664 has 20 divisors (see below), whose sum is σ = 424048689504. Its totient is φ = 106115800576.

The previous prime is 212231601653. The next prime is 212231601683. The reversal of 212231601664 is 466106132212.

212231601664 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 207256912 + ... + 207257935.

Almost surely, 2^212231601664 is an apocalyptic number.

It is an amenable number.

212231601664 is a deficient number, since it is larger than the sum of its proper divisors (211817087840).

212231601664 is an frugal number, since it uses more digits than its factorization.

212231601664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 414514865 (or 414514849 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 34.

Adding to 212231601664 its reverse (466106132212), we get a palindrome (678337733876).

The spelling of 212231601664 in words is "two hundred twelve billion, two hundred thirty-one million, six hundred one thousand, six hundred sixty-four".