23216426550 has 432 divisors, whose sum is σ = 71957706912. Its totient is φ = 5542732800.

The previous prime is 23216426549. The next prime is 23216426603. The reversal of 23216426550 is 5562461232.

23216426550 is a `hidden beast` number, since 2 + 3 + 2 + 1 + 642 + 6 + 5 + 5 + 0 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 215 ways as a sum of consecutive naturals, for example, 128267460 + ... + 128267640.

It is an arithmetic number, because the mean of its divisors is an integer number (166568766).

Almost surely, 2^23216426550 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 23216426550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35978853456).

23216426550 is an abundant number, since it is smaller than the sum of its proper divisors (48741280362).

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

23216426550 is a wasteful number, since it uses less digits than its factorization.

23216426550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 257 (or 231 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 36.

Adding to 23216426550 its reverse (5562461232), we get a palindrome (28778887782).

The spelling of 23216426550 in words is "twenty-three billion, two hundred sixteen million, four hundred twenty-six thousand, five hundred fifty".