213131000233 has 2 divisors, whose sum is σ = 213131000234. Its totient is φ = 213131000232.

The previous prime is 213131000213. The next prime is 213131000281. The reversal of 213131000233 is 332000131312.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 123560686144 + 89570314089 = 351512^2 + 299283^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-213131000233 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 213131000233.

It is not a weakly prime, because it can be changed into another prime (213131000213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106565500116 + 106565500117.

It is an arithmetic number, because the mean of its divisors is an integer number (106565500117).

Almost surely, 2^213131000233 is an apocalyptic number.

It is an amenable number.

213131000233 is a deficient number, since it is larger than the sum of its proper divisors (1).

213131000233 is an equidigital number, since it uses as much as digits as its factorization.

213131000233 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 324, while the sum is 19.

Adding to 213131000233 its reverse (332000131312), we get a palindrome (545131131545).

The spelling of 213131000233 in words is "two hundred thirteen billion, one hundred thirty-one million, two hundred thirty-three", and thus it is an aban number.