213131203 has 2 divisors, whose sum is σ = 213131204. Its totient is φ = 213131202.

The previous prime is 213131197. The next prime is 213131207. The reversal of 213131203 is 302131312.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-213131203 is a prime.

It is not a weakly prime, because it can be changed into another prime (213131207) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106565601 + 106565602.

It is an arithmetic number, because the mean of its divisors is an integer number (106565602).

Almost surely, 2^213131203 is an apocalyptic number.

213131203 is a deficient number, since it is larger than the sum of its proper divisors (1).

213131203 is an equidigital number, since it uses as much as digits as its factorization.

213131203 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 108, while the sum is 16.

The square root of 213131203 is about 14599.0137680598. The cubic root of 213131203 is about 597.3318591092.

Adding to 213131203 its reverse (302131312), we get a palindrome (515262515).

The spelling of 213131203 in words is "two hundred thirteen million, one hundred thirty-one thousand, two hundred three".