22251020 has 24 divisors (see below), whose sum is σ = 50975568. Its totient is φ = 8091200.

The previous prime is 22251017. The next prime is 22251029. The reversal of 22251020 is 2015222.

It is a junction number, because it is equal to n+sod(n) for n = 22250986 and 22251004.

It is not an unprimeable number, because it can be changed into a prime (22251029) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50351 + ... + 50790.

It is an arithmetic number, because the mean of its divisors is an integer number (2123982).

Almost surely, 2^22251020 is an apocalyptic number.

22251020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22251020 is an abundant number, since it is smaller than the sum of its proper divisors (28724548).

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

22251020 is a wasteful number, since it uses less digits than its factorization.

22251020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101161 (or 101159 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 14.

The square root of 22251020 is about 4717.0986845730. The cubic root of 22251020 is about 281.2656142772.

Adding to 22251020 its reverse (2015222), we get a palindrome (24266242).

The spelling of 22251020 in words is "twenty-two million, two hundred fifty-one thousand, twenty".