11145551 has 2 divisors, whose sum is σ = 11145552. Its totient is φ = 11145550.

The previous prime is 11145539. The next prime is 11145569. The reversal of 11145551 is 15554111.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 11145551 - 2⁶ = 11145487 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11145521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5572775 + 5572776.

It is an arithmetic number, because the mean of its divisors is an integer number (5572776).

Almost surely, 2^11145551 is an apocalyptic number.

11145551 is a deficient number, since it is larger than the sum of its proper divisors (1).

11145551 is an equidigital number, since it uses as much as digits as its factorization.

11145551 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 500, while the sum is 23.

The square root of 11145551 is about 3338.4953197511. The cubic root of 11145551 is about 223.3746308621.

Adding to 11145551 its reverse (15554111), we get a palindrome (26699662).

It can be divided in two parts, 11 and 145551, that multiplied together give a palindrome (1601061).

The spelling of 11145551 in words is "eleven million, one hundred forty-five thousand, five hundred fifty-one".