11216571 has 16 divisors (see below), whose sum is σ = 15724800. Its totient is φ = 7098080.

The previous prime is 11216567. The next prime is 11216573. The reversal of 11216571 is 17561211.

It is a cyclic number.

It is not a de Polignac number, because 11216571 - 2² = 11216567 is a prime.

It is a super-2 number, since 2×11216571² = 251622929996082, which contains 22 as substring.

It is a nialpdrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (11216573) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9736 + ... + 10826.

It is an arithmetic number, because the mean of its divisors is an integer number (982800).

Almost surely, 2^11216571 is an apocalyptic number.

11216571 is a deficient number, since it is larger than the sum of its proper divisors (4508229).

11216571 is a wasteful number, since it uses less digits than its factorization.

11216571 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1266.

The product of its digits is 420, while the sum is 24.

The square root of 11216571 is about 3349.1149577164. The cubic root of 11216571 is about 223.8480780556.

Adding to 11216571 its reverse (17561211), we get a palindrome (28777782).

The spelling of 11216571 in words is "eleven million, two hundred sixteen thousand, five hundred seventy-one".