11381222 has 4 divisors (see below), whose sum is σ = 17071836. Its totient is φ = 5690610.

The previous prime is 11381221. The next prime is 11381233. The reversal of 11381222 is 22218311.

It is a semiprime because it is the product of two primes.

It is a nialpdrome in base 15.

It is a junction number, because it is equal to n+sod(n) for n = 11381194 and 11381203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11381221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2845304 + ... + 2845307.

It is an arithmetic number, because the mean of its divisors is an integer number (4267959).

Almost surely, 2^11381222 is an apocalyptic number.

11381222 is a deficient number, since it is larger than the sum of its proper divisors (5690614).

11381222 is an equidigital number, since it uses as much as digits as its factorization.

11381222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5690613.

The product of its digits is 192, while the sum is 20.

The square root of 11381222 is about 3373.6066753550. The cubic root of 11381222 is about 224.9380701986.

Adding to 11381222 its reverse (22218311), we get a palindrome (33599533).

The spelling of 11381222 in words is "eleven million, three hundred eighty-one thousand, two hundred twenty-two".