11222520 has 64 divisors (see below), whose sum is σ = 34503840. Its totient is φ = 2918400.

The previous prime is 11222501. The next prime is 11222539. The reversal of 11222520 is 2522211.

It is an interprime number because it is at equal distance from previous prime (11222501) and next prime (11222539).

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

It is a self number, because there is not a number n which added to its sum of digits gives 11222520.

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, 3780 + ... + 6060.

Almost surely, 2^11222520 is an apocalyptic number.

11222520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11222520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17251920).

11222520 is an abundant number, since it is smaller than the sum of its proper divisors (23281320).

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

11222520 is a wasteful number, since it uses less digits than its factorization.

11222520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2336 (or 2332 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 15.

The square root of 11222520 is about 3350.0029850733. The cubic root of 11222520 is about 223.8876456103.

Adding to 11222520 its reverse (2522211), we get a palindrome (13744731).

The spelling of 11222520 in words is "eleven million, two hundred twenty-two thousand, five hundred twenty".