212230145 has 16 divisors (see below), whose sum is σ = 266450688. Its totient is φ = 162111360.

The previous prime is 212230111. The next prime is 212230181. The reversal of 212230145 is 541032212.

It is not a de Polignac number, because 212230145 - 2¹⁴ = 212213761 is a prime.

It is a Duffinian number.

It is a Curzon number.

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, 1379 + ... + 20648.

It is an arithmetic number, because the mean of its divisors is an integer number (16653168).

Almost surely, 2^212230145 is an apocalyptic number.

It is an amenable number.

212230145 is a deficient number, since it is larger than the sum of its proper divisors (54220543).

212230145 is a wasteful number, since it uses less digits than its factorization.

212230145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22120.

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 212230145 is about 14568.1208465608. The cubic root of 212230145 is about 596.4888870736.

Adding to 212230145 its reverse (541032212), we get a palindrome (753262357).

The spelling of 212230145 in words is "two hundred twelve million, two hundred thirty thousand, one hundred forty-five".