195871572 has 72 divisors (see below), whose sum is σ = 537220320. Its totient is φ = 59814720.

The previous prime is 195871561. The next prime is 195871591. The reversal of 195871572 is 275178591.

195871572 is a `hidden beast` number, since 1 + 9 + 5 + 8 + 71 + 572 = 666.

195871572 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 63547 + ... + 66557.

Almost surely, 2^195871572 is an apocalyptic number.

195871572 is a gapful number since it is divisible by the number (12) 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 195871572, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (268610160).

195871572 is an abundant number, since it is smaller than the sum of its proper divisors (341348748).

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

195871572 is a wasteful number, since it uses less digits than its factorization.

195871572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3173 (or 3168 counting only the distinct ones).

The product of its digits is 176400, while the sum is 45.

The square root of 195871572 is about 13995.4125341127. The cubic root of 195871572 is about 580.7516730616.

The spelling of 195871572 in words is "one hundred ninety-five million, eight hundred seventy-one thousand, five hundred seventy-two".