212243972 has 6 divisors (see below), whose sum is σ = 371426958. Its totient is φ = 106121984.

The previous prime is 212243957. The next prime is 212243981. The reversal of 212243972 is 279342212.

It can be written as a sum of positive squares in only one way, i.e., 211295296 + 948676 = 14536^2 + 974^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26530493 + ... + 26530500.

It is an arithmetic number, because the mean of its divisors is an integer number (61904493).

Almost surely, 2^212243972 is an apocalyptic number.

It is an amenable number.

212243972 is a deficient number, since it is larger than the sum of its proper divisors (159182986).

212243972 is a wasteful number, since it uses less digits than its factorization.

212243972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53060997 (or 53060995 counting only the distinct ones).

The product of its digits is 12096, while the sum is 32.

The square root of 212243972 is about 14568.5954024401. The cubic root of 212243972 is about 596.5018407357.

The spelling of 212243972 in words is "two hundred twelve million, two hundred forty-three thousand, nine hundred seventy-two".