213309841 has 2 divisors, whose sum is σ = 213309842. Its totient is φ = 213309840.

The previous prime is 213309793. The next prime is 213309893. The reversal of 213309841 is 148903312.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 205492225 + 7817616 = 14335^2 + 2796^2 .

It is a cyclic number.

It is not a de Polignac number, because 213309841 - 2¹¹ = 213307793 is a prime.

It is not a weakly prime, because it can be changed into another prime (213309241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106654920 + 106654921.

It is an arithmetic number, because the mean of its divisors is an integer number (106654921).

Almost surely, 2^213309841 is an apocalyptic number.

It is an amenable number.

213309841 is a deficient number, since it is larger than the sum of its proper divisors (1).

213309841 is an equidigital number, since it uses as much as digits as its factorization.

213309841 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 213309841 is about 14605.1306396074. The cubic root of 213309841 is about 597.4986990162.

The spelling of 213309841 in words is "two hundred thirteen million, three hundred nine thousand, eight hundred forty-one".