23221416500 has 48 divisors (see below), whose sum is σ = 52464419280. Its totient is φ = 8968265600.

The previous prime is 23221416479. The next prime is 23221416551. The reversal of 23221416500 is 561412232.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 8044654864 + 15176761636 = 89692^2 + 123194^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 23221416500.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 786239 + ... + 815238.

It is an arithmetic number, because the mean of its divisors is an integer number (1093008735).

Almost surely, 2^23221416500 is an apocalyptic number.

23221416500 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23221416500 is an abundant number, since it is smaller than the sum of its proper divisors (29243002780).

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

23221416500 is a wasteful number, since it uses less digits than its factorization.

23221416500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1601525 (or 1601513 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 26.

Adding to 23221416500 its reverse (561412232), we get a palindrome (23782828732).

The spelling of 23221416500 in words is "twenty-three billion, two hundred twenty-one million, four hundred sixteen thousand, five hundred".