212316428 has 6 divisors (see below), whose sum is σ = 371553756. Its totient is φ = 106158212.

The previous prime is 212316389. The next prime is 212316479. The reversal of 212316428 is 824613212.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 212316428.

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, 26539550 + ... + 26539557.

It is an arithmetic number, because the mean of its divisors is an integer number (61925626).

Almost surely, 2^212316428 is an apocalyptic number.

It is an amenable number.

212316428 is a deficient number, since it is larger than the sum of its proper divisors (159237328).

212316428 is a wasteful number, since it uses less digits than its factorization.

212316428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53079111 (or 53079109 counting only the distinct ones).

The product of its digits is 4608, while the sum is 29.

The square root of 212316428 is about 14571.0819090416. The cubic root of 212316428 is about 596.5697110891.

The spelling of 212316428 in words is "two hundred twelve million, three hundred sixteen thousand, four hundred twenty-eight".