22151118 has 32 divisors (see below), whose sum is σ = 48822912. Its totient is φ = 6644000.

The previous prime is 22151117. The next prime is 22151159. The reversal of 22151118 is 81115122.

It is a junction number, because it is equal to n+sod(n) for n = 22151094 and 22151103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22151117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5005 + ... + 8327.

It is an arithmetic number, because the mean of its divisors is an integer number (1525716).

Almost surely, 2^22151118 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22151118, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24411456).

22151118 is an abundant number, since it is smaller than the sum of its proper divisors (26671794).

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

22151118 is a wasteful number, since it uses less digits than its factorization.

22151118 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3440.

The product of its digits is 160, while the sum is 21.

The square root of 22151118 is about 4706.4974237749. The cubic root of 22151118 is about 280.8440432615.

It can be divided in two parts, 2215 and 1118, that added together give a palindrome (3333).

The spelling of 22151118 in words is "twenty-two million, one hundred fifty-one thousand, one hundred eighteen".