212657012 has 24 divisors (see below), whose sum is σ = 396264960. Its totient is φ = 99509120.

The previous prime is 212657009. The next prime is 212657021. The reversal of 212657012 is 210756212.

It is a congruent number.

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, 3437 + ... + 20907.

It is an arithmetic number, because the mean of its divisors is an integer number (16511040).

Almost surely, 2^212657012 is an apocalyptic number.

It is an amenable number.

212657012 is a deficient number, since it is larger than the sum of its proper divisors (183607948).

212657012 is a wasteful number, since it uses less digits than its factorization.

212657012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17671 (or 17669 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 26.

The square root of 212657012 is about 14582.7642098472. The cubic root of 212657012 is about 596.8885332567. Note that the first 3 decimals are identical.

The spelling of 212657012 in words is "two hundred twelve million, six hundred fifty-seven thousand, twelve".