212770812 has 48 divisors (see below), whose sum is σ = 515821824. Its totient is φ = 68208000.

The previous prime is 212770807. The next prime is 212770813. The reversal of 212770812 is 218077212.

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 212770812.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212770813) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31887 + ... + 37977.

It is an arithmetic number, because the mean of its divisors is an integer number (10746288).

Almost surely, 2^212770812 is an apocalyptic number.

It is an amenable number.

212770812 is an abundant number, since it is smaller than the sum of its proper divisors (303051012).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

212770812 is a wasteful number, since it uses less digits than its factorization.

212770812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6210 (or 6208 counting only the distinct ones).

The product of its (nonzero) digits is 3136, while the sum is 30.

The square root of 212770812 is about 14586.6655545399. The cubic root of 212770812 is about 596.9949860553.

The spelling of 212770812 in words is "two hundred twelve million, seven hundred seventy thousand, eight hundred twelve".