212403412 has 24 divisors (see below), whose sum is σ = 400699656. Its totient is φ = 97934208.

The previous prime is 212403409. The next prime is 212403431. The reversal of 212403412 is 214304212.

It can be written as a sum of positive squares in 4 ways, for example, as 1936 + 212401476 = 44^2 + 14574^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 212403412.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 88938 + ... + 91294.

It is an arithmetic number, because the mean of its divisors is an integer number (16695819).

Almost surely, 2^212403412 is an apocalyptic number.

It is an amenable number.

212403412 is a deficient number, since it is larger than the sum of its proper divisors (188296244).

212403412 is a wasteful number, since it uses less digits than its factorization.

212403412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4107 (or 4105 counting only the distinct ones).

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

The square root of 212403412 is about 14574.0664195001. The cubic root of 212403412 is about 596.6511695915.

Adding to 212403412 its reverse (214304212), we get a palindrome (426707624).

The spelling of 212403412 in words is "two hundred twelve million, four hundred three thousand, four hundred twelve".