11506511 has 2 divisors, whose sum is σ = 11506512. Its totient is φ = 11506510.

The previous prime is 11506507. The next prime is 11506531. The reversal of 11506511 is 11560511.

It is an a-pointer prime, because the next prime (11506531) can be obtained adding 11506511 to its sum of digits (20).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 11506511 - 2² = 11506507 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11506531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5753255 + 5753256.

It is an arithmetic number, because the mean of its divisors is an integer number (5753256).

Almost surely, 2^11506511 is an apocalyptic number.

11506511 is a deficient number, since it is larger than the sum of its proper divisors (1).

11506511 is an equidigital number, since it uses as much as digits as its factorization.

11506511 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 150, while the sum is 20.

The square root of 11506511 is about 3392.1248502966. The cubic root of 11506511 is about 225.7604622604.

The spelling of 11506511 in words is "eleven million, five hundred six thousand, five hundred eleven".