213201749 has 2 divisors, whose sum is σ = 213201750. Its totient is φ = 213201748.

The previous prime is 213201713. The next prime is 213201767. The reversal of 213201749 is 947102312.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 197599249 + 15602500 = 14057^2 + 3950^2 .

It is a cyclic number.

It is not a de Polignac number, because 213201749 - 2²⁴ = 196424533 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213201799) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106600874 + 106600875.

It is an arithmetic number, because the mean of its divisors is an integer number (106600875).

Almost surely, 2^213201749 is an apocalyptic number.

It is an amenable number.

213201749 is a deficient number, since it is larger than the sum of its proper divisors (1).

213201749 is an equidigital number, since it uses as much as digits as its factorization.

213201749 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3024, while the sum is 29.

The square root of 213201749 is about 14601.4296902735. The cubic root of 213201749 is about 597.3977570542.

The spelling of 213201749 in words is "two hundred thirteen million, two hundred one thousand, seven hundred forty-nine".