195020172 has 36 divisors (see below), whose sum is σ = 501054736. Its totient is φ = 63940320.

The previous prime is 195020171. The next prime is 195020191. The reversal of 195020172 is 271020591.

It is a tau number, because it is divible by the number of its divisors (36).

It is not an unprimeable number, because it can be changed into a prime (195020171) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 42208 + ... + 46599.

Almost surely, 2^195020172 is an apocalyptic number.

195020172 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

195020172 is an abundant number, since it is smaller than the sum of its proper divisors (306034564).

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

195020172 is a wasteful number, since it uses less digits than its factorization.

195020172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88878 (or 88873 counting only the distinct ones).

The product of its (nonzero) digits is 1260, while the sum is 27.

The square root of 195020172 is about 13964.9622985528. The cubic root of 195020172 is about 579.9089948377.

It can be divided in two parts, 1950 and 20172, that added together give a palindrome (22122).

The spelling of 195020172 in words is "one hundred ninety-five million, twenty thousand, one hundred seventy-two".