212447912 has 32 divisors (see below), whose sum is σ = 422602920. Its totient is φ = 99778560.

The previous prime is 212447909. The next prime is 212447923. The reversal of 212447912 is 219744212.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 198415396 + 14032516 = 14086^2 + 3746^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 85958 + ... + 88394.

Almost surely, 2^212447912 is an apocalyptic number.

It is an amenable number.

212447912 is a deficient number, since it is larger than the sum of its proper divisors (210155008).

212447912 is a wasteful number, since it uses less digits than its factorization.

212447912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3101 (or 3097 counting only the distinct ones).

The product of its digits is 8064, while the sum is 32.

The square root of 212447912 is about 14575.5930239562. The cubic root of 212447912 is about 596.6928342126.

The spelling of 212447912 in words is "two hundred twelve million, four hundred forty-seven thousand, nine hundred twelve".