11551271 has 4 divisors (see below), whose sum is σ = 11597544. Its totient is φ = 11505000.

The previous prime is 11551261. The next prime is 11551273. The reversal of 11551271 is 17215511.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 11551271 - 2⁶ = 11551207 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11551273) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22760 + ... + 23261.

It is an arithmetic number, because the mean of its divisors is an integer number (2899386).

Almost surely, 2^11551271 is an apocalyptic number.

11551271 is a deficient number, since it is larger than the sum of its proper divisors (46273).

11551271 is an equidigital number, since it uses as much as digits as its factorization.

11551271 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46272.

The product of its digits is 350, while the sum is 23.

The square root of 11551271 is about 3398.7160811106. The cubic root of 11551271 is about 226.0528174253.

Adding to 11551271 its reverse (17215511), we get a palindrome (28766782).

The spelling of 11551271 in words is "eleven million, five hundred fifty-one thousand, two hundred seventy-one".