212305612 has 24 divisors (see below), whose sum is σ = 376044480. Its totient is φ = 104872320.

The previous prime is 212305531. The next prime is 212305631. The reversal of 212305612 is 216503212.

212305612 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an alternating number because its digits alternate between even and odd.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 130162 + ... + 131782.

It is an arithmetic number, because the mean of its divisors is an integer number (15668520).

Almost surely, 2^212305612 is an apocalyptic number.

It is an amenable number.

212305612 is a deficient number, since it is larger than the sum of its proper divisors (163738868).

212305612 is a wasteful number, since it uses less digits than its factorization.

212305612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2001 (or 1999 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 212305612 is about 14570.7107582300. The cubic root of 212305612 is about 596.5595806003.

Adding to 212305612 its reverse (216503212), we get a palindrome (428808824).

The spelling of 212305612 in words is "two hundred twelve million, three hundred five thousand, six hundred twelve".