213301237 has 2 divisors, whose sum is σ = 213301238. Its totient is φ = 213301236.

The previous prime is 213301223. The next prime is 213301279. The reversal of 213301237 is 732103312.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 209265156 + 4036081 = 14466^2 + 2009^2 .

It is a cyclic number.

It is not a de Polignac number, because 213301237 - 2²⁷ = 79083509 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213301217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106650618 + 106650619.

It is an arithmetic number, because the mean of its divisors is an integer number (106650619).

Almost surely, 2^213301237 is an apocalyptic number.

It is an amenable number.

213301237 is a deficient number, since it is larger than the sum of its proper divisors (1).

213301237 is an equidigital number, since it uses as much as digits as its factorization.

213301237 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 756, while the sum is 22.

The square root of 213301237 is about 14604.8360826132. The cubic root of 213301237 is about 597.4906654004.

Adding to 213301237 its reverse (732103312), we get a palindrome (945404549).

The spelling of 213301237 in words is "two hundred thirteen million, three hundred one thousand, two hundred thirty-seven".