11215715 has 8 divisors (see below), whose sum is σ = 15381600. Its totient is φ = 7690752.

The previous prime is 11215703. The next prime is 11215717. The reversal of 11215715 is 51751211.

11215715 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 11215715 - 2¹⁰ = 11214691 is a prime.

It is a super-2 number, since 2×11215715² = 251584525922450, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (11215717) 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, 160190 + ... + 160259.

It is an arithmetic number, because the mean of its divisors is an integer number (1922700).

Almost surely, 2^11215715 is an apocalyptic number.

11215715 is a deficient number, since it is larger than the sum of its proper divisors (4165885).

11215715 is an equidigital number, since it uses as much as digits as its factorization.

11215715 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 320461.

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

The square root of 11215715 is about 3348.9871603218. The cubic root of 11215715 is about 223.8423835396.

Adding to 11215715 its reverse (51751211), we get a palindrome (62966926).

The spelling of 11215715 in words is "eleven million, two hundred fifteen thousand, seven hundred fifteen".