212129776 has 20 divisors (see below), whose sum is σ = 424260544. Its totient is φ = 102643200.

The previous prime is 212129767. The next prime is 212129779. The reversal of 212129776 is 677921212.

212129776 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212129779) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 213345 + ... + 214336.

Almost surely, 2^212129776 is an apocalyptic number.

It is an amenable number.

212129776 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

212129776 is a wasteful number, since it uses less digits than its factorization.

212129776 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 427720 (or 427714 counting only the distinct ones).

The product of its digits is 21168, while the sum is 37.

The square root of 212129776 is about 14564.6756228898. The cubic root of 212129776 is about 596.3948406892.

The spelling of 212129776 in words is "two hundred twelve million, one hundred twenty-nine thousand, seven hundred seventy-six".