11555213 has 2 divisors, whose sum is σ = 11555214. Its totient is φ = 11555212.

The previous prime is 11555207. The next prime is 11555263. The reversal of 11555213 is 31255511.

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., 11377129 + 178084 = 3373^2 + 422^2 .

It is a cyclic number.

It is not a de Polignac number, because 11555213 - 2⁴ = 11555197 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11555263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5777606 + 5777607.

It is an arithmetic number, because the mean of its divisors is an integer number (5777607).

Almost surely, 2^11555213 is an apocalyptic number.

It is an amenable number.

11555213 is a deficient number, since it is larger than the sum of its proper divisors (1).

11555213 is an equidigital number, since it uses as much as digits as its factorization.

11555213 is an evil number, because the sum of its binary digits is even.

The product of its digits is 750, while the sum is 23.

The square root of 11555213 is about 3399.2959565181. The cubic root of 11555213 is about 226.0785288488.

The spelling of 11555213 in words is "eleven million, five hundred fifty-five thousand, two hundred thirteen".