11409551 has 2 divisors, whose sum is σ = 11409552. Its totient is φ = 11409550.

The previous prime is 11409547. The next prime is 11409569. The reversal of 11409551 is 15590411.

11409551 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 11409551 - 2² = 11409547 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11409551.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11409571) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5704775 + 5704776.

It is an arithmetic number, because the mean of its divisors is an integer number (5704776).

Almost surely, 2^11409551 is an apocalyptic number.

11409551 is a deficient number, since it is larger than the sum of its proper divisors (1).

11409551 is an equidigital number, since it uses as much as digits as its factorization.

11409551 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 900, while the sum is 26.

The square root of 11409551 is about 3377.8026881391. The cubic root of 11409551 is about 225.1245466835.

Adding to 11409551 its reverse (15590411), we get a palindrome (26999962).

The spelling of 11409551 in words is "eleven million, four hundred nine thousand, five hundred fifty-one".