11215722 has 32 divisors (see below), whose sum is σ = 25909632. Its totient is φ = 3170304.

The previous prime is 11215717. The next prime is 11215727. The reversal of 11215722 is 22751211.

11215722 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (11215717) and next prime (11215727).

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (11215727) 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, 2698 + ... + 5450.

It is an arithmetic number, because the mean of its divisors is an integer number (809676).

Almost surely, 2^11215722 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11215722, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12954816).

11215722 is an abundant number, since it is smaller than the sum of its proper divisors (14693910).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11215722 is a wasteful number, since it uses less digits than its factorization.

11215722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2862.

The product of its digits is 280, while the sum is 21.

The square root of 11215722 is about 3348.9882054137. The cubic root of 11215722 is about 223.8424301081.

Adding to 11215722 its reverse (22751211), we get a palindrome (33966933).

The spelling of 11215722 in words is "eleven million, two hundred fifteen thousand, seven hundred twenty-two".