195211581100 has 72 divisors (see below), whose sum is σ = 428275557360. Its totient is φ = 77226885120.

The previous prime is 195211581091. The next prime is 195211581109. The reversal of 195211581100 is 1185112591.

195211581100 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (195211581091) and next prime (195211581109).

It is a super-2 number, since 2×195211581100² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (195211581109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6587116 + ... + 6616684.

It is an arithmetic number, because the mean of its divisors is an integer number (5948271630).

Almost surely, 2^195211581100 is an apocalyptic number.

195211581100 is a gapful number since it is divisible by the number (10) 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 195211581100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (214137778680).

195211581100 is an abundant number, since it is smaller than the sum of its proper divisors (233063976260).

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

195211581100 is a wasteful number, since it uses less digits than its factorization.

195211581100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30307 (or 30300 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 34.

Adding to 195211581100 its reverse (1185112591), we get a palindrome (196396693691).

The spelling of 195211581100 in words is "one hundred ninety-five billion, two hundred eleven million, five hundred eighty-one thousand, one hundred".