22115522 has 32 divisors (see below), whose sum is σ = 39735360. Its totient is φ = 9097920.

The previous prime is 22115519. The next prime is 22115531. The reversal of 22115522 is 22551122.

It is a happy number.

It is a zygodrome in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 22115494 and 22115503.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14429 + ... + 15887.

It is an arithmetic number, because the mean of its divisors is an integer number (1241730).

Almost surely, 2^22115522 is an apocalyptic number.

22115522 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

22115522 is a deficient number, since it is larger than the sum of its proper divisors (17619838).

22115522 is a wasteful number, since it uses less digits than its factorization.

22115522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1538.

The product of its digits is 400, while the sum is 20.

The square root of 22115522 is about 4702.7143226014. The cubic root of 22115522 is about 280.6935273938.

Adding to 22115522 its reverse (22551122), we get a palindrome (44666644).

Subtracting 22115522 from its reverse (22551122), we obtain a square (435600 = 660²).

The spelling of 22115522 in words is "twenty-two million, one hundred fifteen thousand, five hundred twenty-two".