11506213 has 2 divisors, whose sum is σ = 11506214. Its totient is φ = 11506212.

The previous prime is 11506171. The next prime is 11506249. The reversal of 11506213 is 31260511.

11506213 is digitally balanced in base 2 and base 3, because in such bases 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., 8485569 + 3020644 = 2913^2 + 1738^2 .

It is a cyclic number.

It is not a de Polignac number, because 11506213 - 2⁹ = 11505701 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11506273) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5753106 + 5753107.

It is an arithmetic number, because the mean of its divisors is an integer number (5753107).

Almost surely, 2^11506213 is an apocalyptic number.

It is an amenable number.

11506213 is a deficient number, since it is larger than the sum of its proper divisors (1).

11506213 is an equidigital number, since it uses as much as digits as its factorization.

11506213 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 180, while the sum is 19.

The square root of 11506213 is about 3392.0809247422. The cubic root of 11506213 is about 225.7585133001.

Adding to 11506213 its reverse (31260511), we get a palindrome (42766724).

The spelling of 11506213 in words is "eleven million, five hundred six thousand, two hundred thirteen".