11215899 has 12 divisors (see below), whose sum is σ = 16271112. Its totient is φ = 7444800.

The previous prime is 11215889. The next prime is 11215907. The reversal of 11215899 is 99851211.

It is not a de Polignac number, because 11215899 - 2¹⁵ = 11183131 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11215829) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 417 + ... + 4754.

It is an arithmetic number, because the mean of its divisors is an integer number (1355926).

Almost surely, 2^11215899 is an apocalyptic number.

11215899 is a deficient number, since it is larger than the sum of its proper divisors (5055213).

11215899 is a wasteful number, since it uses less digits than its factorization.

11215899 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5418 (or 5415 counting only the distinct ones).

The product of its digits is 6480, while the sum is 36.

The square root of 11215899 is about 3349.0146312012. The cubic root of 11215899 is about 223.8436076189.

The spelling of 11215899 in words is "eleven million, two hundred fifteen thousand, eight hundred ninety-nine".