11131215 has 16 divisors (see below), whose sum is σ = 18424800. Its totient is φ = 5731712.

The previous prime is 11131187. The next prime is 11131229. The reversal of 11131215 is 51213111.

It is a cyclic number.

It is not a de Polignac number, because 11131215 - 2¹³ = 11123023 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a junction number, because it is equal to n+sod(n) for n = 11131194 and 11131203.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12360 + ... + 13229.

It is an arithmetic number, because the mean of its divisors is an integer number (1151550).

Almost surely, 2^11131215 is an apocalyptic number.

11131215 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

11131215 is a deficient number, since it is larger than the sum of its proper divisors (7293585).

11131215 is a wasteful number, since it uses less digits than its factorization.

11131215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25626.

The product of its digits is 30, while the sum is 15.

The square root of 11131215 is about 3336.3475538379. The cubic root of 11131215 is about 223.2788176633.

Adding to 11131215 its reverse (51213111), we get a palindrome (62344326).

The spelling of 11131215 in words is "eleven million, one hundred thirty-one thousand, two hundred fifteen".