11571216 has 20 divisors (see below), whose sum is σ = 29892432. Its totient is φ = 3857056.

The previous prime is 11571199. The next prime is 11571221. The reversal of 11571216 is 61217511.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 120486 + ... + 120581.

Almost surely, 2^11571216 is an apocalyptic number.

11571216 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

11571216 is an abundant number, since it is smaller than the sum of its proper divisors (18321216).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11571216 is a wasteful number, since it uses less digits than its factorization.

11571216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 241078 (or 241072 counting only the distinct ones).

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

The square root of 11571216 is about 3401.6490118764. The cubic root of 11571216 is about 226.1828473009.

Adding to 11571216 its reverse (61217511), we get a palindrome (72788727).

The spelling of 11571216 in words is "eleven million, five hundred seventy-one thousand, two hundred sixteen".