23225221220 has 24 divisors (see below), whose sum is σ = 48985956600. Its totient is φ = 9249518592.

The previous prime is 23225221219. The next prime is 23225221223. The reversal of 23225221220 is 2212252232.

It can be written as a sum of positive squares in 4 ways, for example, as 9117958144 + 14107263076 = 95488^2 + 118774^2 .

It is not an unprimeable number, because it can be changed into a prime (23225221223) 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 7 ways as a sum of consecutive naturals, for example, 2530925 + ... + 2540084.

It is an arithmetic number, because the mean of its divisors is an integer number (2041081525).

Almost surely, 2^23225221220 is an apocalyptic number.

23225221220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23225221220 is an abundant number, since it is smaller than the sum of its proper divisors (25760735380).

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

23225221220 is a wasteful number, since it uses less digits than its factorization.

23225221220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5071247 (or 5071245 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 23.

Adding to 23225221220 its reverse (2212252232), we get a palindrome (25437473452).

It can be divided in two parts, 232252212 and 20, that added together give a palindrome (232252232).

The spelling of 23225221220 in words is "twenty-three billion, two hundred twenty-five million, two hundred twenty-one thousand, two hundred twenty".