212821292 has 6 divisors (see below), whose sum is σ = 372437268. Its totient is φ = 106410644.

The previous prime is 212821289. The next prime is 212821321. The reversal of 212821292 is 292128212.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26602658 + ... + 26602665.

It is an arithmetic number, because the mean of its divisors is an integer number (62072878).

Almost surely, 2^212821292 is an apocalyptic number.

It is an amenable number.

212821292 is a deficient number, since it is larger than the sum of its proper divisors (159615976).

212821292 is a wasteful number, since it uses less digits than its factorization.

212821292 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53205327 (or 53205325 counting only the distinct ones).

The product of its digits is 2304, while the sum is 29.

The square root of 212821292 is about 14588.3957994017. The cubic root of 212821292 is about 597.0421947923.

The spelling of 212821292 in words is "two hundred twelve million, eight hundred twenty-one thousand, two hundred ninety-two".