11320551 has 24 divisors (see below), whose sum is σ = 18280080. Its totient is φ = 6691200.

The previous prime is 11320537. The next prime is 11320553. The reversal of 11320551 is 15502311.

11320551 is a `hidden beast` number, since 113 + 2 + 0 + 551 = 666.

It is not a de Polignac number, because 11320551 - 2⁷ = 11320423 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11320553) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2665 + ... + 5453.

It is an arithmetic number, because the mean of its divisors is an integer number (761670).

Almost surely, 2^11320551 is an apocalyptic number.

11320551 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

11320551 is a deficient number, since it is larger than the sum of its proper divisors (6959529).

11320551 is a wasteful number, since it uses less digits than its factorization.

11320551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2847 (or 2844 counting only the distinct ones).

The product of its (nonzero) digits is 150, while the sum is 18.

The square root of 11320551 is about 3364.6026511313. The cubic root of 11320551 is about 224.5376580132.

Adding to 11320551 its reverse (15502311), we get a palindrome (26822862).

The spelling of 11320551 in words is "eleven million, three hundred twenty thousand, five hundred fifty-one".