11157271 has 4 divisors (see below), whose sum is σ = 11189232. Its totient is φ = 11125312.

The previous prime is 11157259. The next prime is 11157319. The reversal of 11157271 is 17275111.

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 11157271 - 2¹⁷ = 11026199 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 (11157221) 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, 15451 + ... + 16156.

It is an arithmetic number, because the mean of its divisors is an integer number (2797308).

Almost surely, 2^11157271 is an apocalyptic number.

11157271 is a deficient number, since it is larger than the sum of its proper divisors (31961).

11157271 is an equidigital number, since it uses as much as digits as its factorization.

11157271 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31960.

The product of its digits is 490, while the sum is 25.

The square root of 11157271 is about 3340.2501403338. The cubic root of 11157271 is about 223.4528992696.

The spelling of 11157271 in words is "eleven million, one hundred fifty-seven thousand, two hundred seventy-one".