212065730 has 32 divisors (see below), whose sum is σ = 399472128. Its totient is φ = 80956800.

The previous prime is 212065717. The next prime is 212065741. The reversal of 212065730 is 37560212.

It is a self number, because there is not a number n which added to its sum of digits gives 212065730.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17945 + ... + 27315.

It is an arithmetic number, because the mean of its divisors is an integer number (12483504).

Almost surely, 2^212065730 is an apocalyptic number.

212065730 is a deficient number, since it is larger than the sum of its proper divisors (187406398).

212065730 is a wasteful number, since it uses less digits than its factorization.

212065730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9482.

The product of its (nonzero) digits is 2520, while the sum is 26.

The square root of 212065730 is about 14562.4767810974. The cubic root of 212065730 is about 596.3348136789.

The spelling of 212065730 in words is "two hundred twelve million, sixty-five thousand, seven hundred thirty".