11201551 has 2 divisors, whose sum is σ = 11201552. Its totient is φ = 11201550.

The previous prime is 11201549. The next prime is 11201573. The reversal of 11201551 is 15510211.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 11201551 - 2¹ = 11201549 is a prime.

Together with 11201549, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11201501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5600775 + 5600776.

It is an arithmetic number, because the mean of its divisors is an integer number (5600776).

Almost surely, 2^11201551 is an apocalyptic number.

11201551 is a deficient number, since it is larger than the sum of its proper divisors (1).

11201551 is an equidigital number, since it uses as much as digits as its factorization.

11201551 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 50, while the sum is 16.

The square root of 11201551 is about 3346.8718230611. The cubic root of 11201551 is about 223.7481158357.

Adding to 11201551 its reverse (15510211), we get a palindrome (26711762).

The spelling of 11201551 in words is "eleven million, two hundred one thousand, five hundred fifty-one".