23211522100 has 72 divisors (see below), whose sum is σ = 54723919320. Its totient is φ = 8494510080.

The previous prime is 23211522071. The next prime is 23211522127. The reversal of 23211522100 is 122511232.

It can be written as a sum of positive squares in 12 ways, for example, as 9946471824 + 13265050276 = 99732^2 + 115174^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 67896 + ... + 225904.

It is an arithmetic number, because the mean of its divisors is an integer number (760054435).

Almost surely, 2^23211522100 is an apocalyptic number.

23211522100 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 23211522100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27361959660).

23211522100 is an abundant number, since it is smaller than the sum of its proper divisors (31512397220).

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

23211522100 is a wasteful number, since it uses less digits than its factorization.

23211522100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158149 (or 158142 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 19.

The spelling of 23211522100 in words is "twenty-three billion, two hundred eleven million, five hundred twenty-two thousand, one hundred".