11157215 has 8 divisors (see below), whose sum is σ = 13417488. Its totient is φ = 8906560.

The previous prime is 11157197. The next prime is 11157217. The reversal of 11157215 is 51275111.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-11157215 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11157217) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 464 + ... + 4746.

It is an arithmetic number, because the mean of its divisors is an integer number (1677186).

Almost surely, 2^11157215 is an apocalyptic number.

11157215 is a deficient number, since it is larger than the sum of its proper divisors (2260273).

11157215 is an equidigital number, since it uses as much as digits as its factorization.

11157215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4809.

The product of its digits is 350, while the sum is 23.

The square root of 11157215 is about 3340.2417577175. The cubic root of 11157215 is about 223.4525254212.

The spelling of 11157215 in words is "eleven million, one hundred fifty-seven thousand, two hundred fifteen".