212661996 has 24 divisors (see below), whose sum is σ = 502494720. Its totient is φ = 69989712.

The previous prime is 212661989. The next prime is 212661997. The reversal of 212661996 is 699166212.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (212661997) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 111216 + ... + 113111.

It is an arithmetic number, because the mean of its divisors is an integer number (20937280).

Almost surely, 2^212661996 is an apocalyptic number.

It is an amenable number.

212661996 is an abundant number, since it is smaller than the sum of its proper divisors (289832724).

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

212661996 is a wasteful number, since it uses less digits than its factorization.

212661996 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 224413 (or 224411 counting only the distinct ones).

The product of its digits is 69984, while the sum is 42.

The square root of 212661996 is about 14582.9350955149. The cubic root of 212661996 is about 596.8931962728.

The spelling of 212661996 in words is "two hundred twelve million, six hundred sixty-one thousand, nine hundred ninety-six".