23221317000 has 256 divisors, whose sum is σ = 82973030400. Its totient is φ = 5296684800.

The previous prime is 23221316981. The next prime is 23221317011. The reversal of 23221317000 is 71312232.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 14342191 + ... + 14343809.

It is an arithmetic number, because the mean of its divisors is an integer number (324113400).

Almost surely, 2^23221317000 is an apocalyptic number.

23221317000 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 23221317000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41486515200).

23221317000 is an abundant number, since it is smaller than the sum of its proper divisors (59751713400).

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

23221317000 is a wasteful number, since it uses less digits than its factorization.

23221317000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2333 (or 2319 counting only the distinct ones).

The product of its (nonzero) digits is 504, while the sum is 21.

Adding to 23221317000 its reverse (71312232), we get a palindrome (23292629232).

The spelling of 23221317000 in words is "twenty-three billion, two hundred twenty-one million, three hundred seventeen thousand".