22731250000 has 90 divisors (see below), whose sum is σ = 55067354618. Its totient is φ = 9090000000.

The previous prime is 22731249979. The next prime is 22731250007. The reversal of 22731250000 is 5213722.

It can be written as a sum of positive squares in 9 ways, for example, as 1984880704 + 20746369296 = 44552^2 + 144036^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22731250007) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 6248182 + ... + 6251818.

Almost surely, 2^22731250000 is an apocalyptic number.

22731250000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22731250000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27533677309).

22731250000 is an abundant number, since it is smaller than the sum of its proper divisors (32336104618).

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

22731250000 is an frugal number, since it uses more digits than its factorization.

22731250000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3685 (or 3644 counting only the distinct ones).

The product of its (nonzero) digits is 840, while the sum is 22.

Adding to 22731250000 its reverse (5213722), we get a palindrome (22736463722).

The spelling of 22731250000 in words is "twenty-two billion, seven hundred thirty-one million, two hundred fifty thousand".