212657207 has 6 divisors (see below), whose sum is σ = 247376808. Its totient is φ = 182277564.

The previous prime is 212657189. The next prime is 212657213. The reversal of 212657207 is 702756212.

It is not a de Polignac number, because 212657207 - 2¹⁶ = 212591671 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212657507) 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, 2169923 + ... + 2170020.

It is an arithmetic number, because the mean of its divisors is an integer number (41229468).

Almost surely, 2^212657207 is an apocalyptic number.

212657207 is a deficient number, since it is larger than the sum of its proper divisors (34719601).

212657207 is an equidigital number, since it uses as much as digits as its factorization.

212657207 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4339957 (or 4339950 counting only the distinct ones).

The product of its (nonzero) digits is 11760, while the sum is 32.

The square root of 212657207 is about 14582.7708958209. The cubic root of 212657207 is about 596.8887156996. Note that the first 3 decimals are identical.

The spelling of 212657207 in words is "two hundred twelve million, six hundred fifty-seven thousand, two hundred seven".