11565213 has 16 divisors (see below), whose sum is σ = 17000256. Its totient is φ = 6935040.

The previous prime is 11565209. The next prime is 11565233. The reversal of 11565213 is 31256511.

11565213 is digitally balanced in base 2, base 3 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 11565213 - 2² = 11565209 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11565233) 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, 1395 + ... + 5007.

It is an arithmetic number, because the mean of its divisors is an integer number (1062516).

Almost surely, 2^11565213 is an apocalyptic number.

It is an amenable number.

11565213 is a deficient number, since it is larger than the sum of its proper divisors (5435043).

11565213 is a wasteful number, since it uses less digits than its factorization.

11565213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3724.

The product of its digits is 900, while the sum is 24.

The square root of 11565213 is about 3400.7665312397. The cubic root of 11565213 is about 226.1437269382.

The spelling of 11565213 in words is "eleven million, five hundred sixty-five thousand, two hundred thirteen".