212865047 has 6 divisors (see below), whose sum is σ = 214329528. Its totient is φ = 211402992.

The previous prime is 212865043. The next prime is 212865049. The reversal of 212865047 is 740568212.

It is not a de Polignac number, because 212865047 - 2² = 212865043 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 212864998 and 212865016.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212865043) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 187979 + ... + 189107.

It is an arithmetic number, because the mean of its divisors is an integer number (35721588).

Almost surely, 2^212865047 is an apocalyptic number.

212865047 is a deficient number, since it is larger than the sum of its proper divisors (1464481).

212865047 is an frugal number, since it uses more digits than its factorization.

212865047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2425 (or 1296 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 35.

The square root of 212865047 is about 14589.8953731684. The cubic root of 212865047 is about 597.0831082913.

The spelling of 212865047 in words is "two hundred twelve million, eight hundred sixty-five thousand, forty-seven".