22451022 has 48 divisors (see below), whose sum is σ = 53492400. Its totient is φ = 6748800.

The previous prime is 22451003. The next prime is 22451029. The reversal of 22451022 is 22015422.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 22450986 and 22451004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22451029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 29122 + ... + 29882.

It is an arithmetic number, because the mean of its divisors is an integer number (1114425).

Almost surely, 2^22451022 is an apocalyptic number.

22451022 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 22451022, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26746200).

22451022 is an abundant number, since it is smaller than the sum of its proper divisors (31041378).

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

22451022 is a wasteful number, since it uses less digits than its factorization.

22451022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 929 (or 926 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 18.

The square root of 22451022 is about 4738.2509431224. The cubic root of 22451022 is about 282.1058151262.

Adding to 22451022 its reverse (22015422), we get a palindrome (44466444).

Subtracting from 22451022 its reverse (22015422), we obtain a square (435600 = 660²).

The spelling of 22451022 in words is "twenty-two million, four hundred fifty-one thousand, twenty-two".