210640133 has 16 divisors (see below), whose sum is σ = 237841920. Its totient is φ = 184814400.

The previous prime is 210640109. The next prime is 210640151. The reversal of 210640133 is 331046012.

It is a cyclic number.

It is not a de Polignac number, because 210640133 - 2⁶ = 210640069 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210640153) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 189383 + ... + 190491.

It is an arithmetic number, because the mean of its divisors is an integer number (14865120).

Almost surely, 2^210640133 is an apocalyptic number.

It is an amenable number.

210640133 is a deficient number, since it is larger than the sum of its proper divisors (27201787).

210640133 is a wasteful number, since it uses less digits than its factorization.

210640133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1708.

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 210640133 is about 14513.4466271799. The cubic root of 210640133 is about 594.9955351217.

Adding to 210640133 its reverse (331046012), we get a palindrome (541686145).

The spelling of 210640133 in words is "two hundred ten million, six hundred forty thousand, one hundred thirty-three".