212312404 has 6 divisors (see below), whose sum is σ = 371546714. Its totient is φ = 106156200.

The previous prime is 212312369. The next prime is 212312411. The reversal of 212312404 is 404213212.

It can be written as a sum of positive squares in only one way, i.e., 117288900 + 95023504 = 10830^2 + 9748^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26539047 + ... + 26539054.

Almost surely, 2^212312404 is an apocalyptic number.

It is an amenable number.

212312404 is a deficient number, since it is larger than the sum of its proper divisors (159234310).

212312404 is a wasteful number, since it uses less digits than its factorization.

212312404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53078105 (or 53078103 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 212312404 is about 14570.9438266709. The cubic root of 212312404 is about 596.5659421678.

Adding to 212312404 its reverse (404213212), we get a palindrome (616525616).

The spelling of 212312404 in words is "two hundred twelve million, three hundred twelve thousand, four hundred four".