213023257 has 2 divisors, whose sum is σ = 213023258. Its totient is φ = 213023256.

The previous prime is 213023201. The next prime is 213023267. The reversal of 213023257 is 752320312.

213023257 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 124456336 + 88566921 = 11156^2 + 9411^2 .

It is a cyclic number.

It is not a de Polignac number, because 213023257 - 2¹⁹ = 212498969 is a prime.

It is not a weakly prime, because it can be changed into another prime (213023267) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106511628 + 106511629.

It is an arithmetic number, because the mean of its divisors is an integer number (106511629).

Almost surely, 2^213023257 is an apocalyptic number.

It is an amenable number.

213023257 is a deficient number, since it is larger than the sum of its proper divisors (1).

213023257 is an equidigital number, since it uses as much as digits as its factorization.

213023257 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2520, while the sum is 25.

The square root of 213023257 is about 14595.3162692694. The cubic root of 213023257 is about 597.2309971788.

Adding to 213023257 its reverse (752320312), we get a palindrome (965343569).

The spelling of 213023257 in words is "two hundred thirteen million, twenty-three thousand, two hundred fifty-seven".