212730 has 32 divisors (see below), whose sum is σ = 584064. Its totient is φ = 48576.

The previous prime is 212701. The next prime is 212777. The reversal of 212730 is 37212.

212730 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is an Ulam number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 297 + ... + 716.

It is an arithmetic number, because the mean of its divisors is an integer number (18252).

2²¹²⁷³⁰ is an apocalyptic number.

212730 is an abundant number, since it is smaller than the sum of its proper divisors (371334).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

212730 is a wasteful number, since it uses less digits than its factorization.

212730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1030.

The product of its (nonzero) digits is 84, while the sum is 15.

The square root of 212730 is about 461.2266254240. The cubic root of 212730 is about 59.6956813342.

Adding to 212730 its reverse (37212), we get a palindrome (249942).

The spelling of 212730 in words is "two hundred twelve thousand, seven hundred thirty".