212197305 has 8 divisors (see below), whose sum is σ = 339515712. Its totient is φ = 113171888.

The previous prime is 212197291. The next prime is 212197309. The reversal of 212197305 is 503791212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 212197305 - 2⁵ = 212197273 is a prime.

It is not an unprimeable number, because it can be changed into a prime (212197309) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7073229 + ... + 7073258.

It is an arithmetic number, because the mean of its divisors is an integer number (42439464).

Almost surely, 2^212197305 is an apocalyptic number.

It is an amenable number.

212197305 is a deficient number, since it is larger than the sum of its proper divisors (127318407).

212197305 is a wasteful number, since it uses less digits than its factorization.

212197305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14146495.

The product of its (nonzero) digits is 3780, while the sum is 30.

The square root of 212197305 is about 14566.9936843537. The cubic root of 212197305 is about 596.4581190513.

The spelling of 212197305 in words is "two hundred twelve million, one hundred ninety-seven thousand, three hundred five".