213230133 has 12 divisors (see below), whose sum is σ = 326116908. Its totient is φ = 133791360.

The previous prime is 213230131. The next prime is 213230137. The reversal of 213230133 is 331032312.

213230133 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 87946884 + 125283249 = 9378^2 + 11193^2 .

It is not a de Polignac number, because 213230133 - 2¹ = 213230131 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213230131) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 696678 + ... + 696983.

It is an arithmetic number, because the mean of its divisors is an integer number (27176409).

Almost surely, 2^213230133 is an apocalyptic number.

It is an amenable number.

213230133 is a deficient number, since it is larger than the sum of its proper divisors (112886775).

213230133 is a wasteful number, since it uses less digits than its factorization.

213230133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1393684 (or 1393681 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 18.

The square root of 213230133 is about 14602.4016175422. The cubic root of 213230133 is about 597.4242668203.

Adding to 213230133 its reverse (331032312), we get a palindrome (544262445).

The spelling of 213230133 in words is "two hundred thirteen million, two hundred thirty thousand, one hundred thirty-three".