11501533 has 2 divisors, whose sum is σ = 11501534. Its totient is φ = 11501532.

The previous prime is 11501509. The next prime is 11501543. The reversal of 11501533 is 33510511.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9108324 + 2393209 = 3018^2 + 1547^2 .

It is an emirp because it is prime and its reverse (33510511) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11501533 is a prime.

It is a super-2 number, since 2×11501533² = 264570522700178, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 11501533.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11501543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5750766 + 5750767.

It is an arithmetic number, because the mean of its divisors is an integer number (5750767).

Almost surely, 2^11501533 is an apocalyptic number.

It is an amenable number.

11501533 is a deficient number, since it is larger than the sum of its proper divisors (1).

11501533 is an equidigital number, since it uses as much as digits as its factorization.

11501533 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 225, while the sum is 19.

The square root of 11501533 is about 3391.3910125493. The cubic root of 11501533 is about 225.7279010526.

The spelling of 11501533 in words is "eleven million, five hundred one thousand, five hundred thirty-three".