213144630 has 16 divisors (see below), whose sum is σ = 511547184. Its totient is φ = 56838560.

The previous prime is 213144629. The next prime is 213144637. The reversal of 213144630 is 36441312.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 213144630.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213144637) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 3552381 + ... + 3552440.

It is an arithmetic number, because the mean of its divisors is an integer number (31971699).

Almost surely, 2^213144630 is an apocalyptic number.

213144630 is an abundant number, since it is smaller than the sum of its proper divisors (298402554).

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

213144630 is a wasteful number, since it uses less digits than its factorization.

213144630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7104831.

The product of its (nonzero) digits is 1728, while the sum is 24.

The square root of 213144630 is about 14599.4736206481. The cubic root of 213144630 is about 597.3444025666.

Adding to 213144630 its reverse (36441312), we get a palindrome (249585942).

The spelling of 213144630 in words is "two hundred thirteen million, one hundred forty-four thousand, six hundred thirty".