11225551 has 2 divisors, whose sum is σ = 11225552. Its totient is φ = 11225550.

The previous prime is 11225549. The next prime is 11225567. The reversal of 11225551 is 15552211.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 11225551 - 2¹ = 11225549 is a prime.

Together with 11225549, 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 (11225531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5612775 + 5612776.

It is an arithmetic number, because the mean of its divisors is an integer number (5612776).

Almost surely, 2^11225551 is an apocalyptic number.

11225551 is a deficient number, since it is larger than the sum of its proper divisors (1).

11225551 is an equidigital number, since it uses as much as digits as its factorization.

11225551 is an evil number, because the sum of its binary digits is even.

The product of its digits is 500, while the sum is 22.

The square root of 11225551 is about 3350.4553421886. The cubic root of 11225551 is about 223.9077997993.

Adding to 11225551 its reverse (15552211), we get a palindrome (26777762).

The spelling of 11225551 in words is "eleven million, two hundred twenty-five thousand, five hundred fifty-one".