195591972 has 24 divisors (see below), whose sum is σ = 457583616. Its totient is φ = 65025568.

The previous prime is 195591967. The next prime is 195591973. The reversal of 195591972 is 279195591.

It is not an unprimeable number, because it can be changed into a prime (195591973) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16683 + ... + 25874.

It is an arithmetic number, because the mean of its divisors is an integer number (19065984).

Almost surely, 2^195591972 is an apocalyptic number.

195591972 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

195591972 is an abundant number, since it is smaller than the sum of its proper divisors (261991644).

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

195591972 is a wasteful number, since it uses less digits than its factorization.

195591972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42947 (or 42945 counting only the distinct ones).

The product of its digits is 255150, while the sum is 48.

The square root of 195591972 is about 13985.4199793928. The cubic root of 195591972 is about 580.4752070579.

The spelling of 195591972 in words is "one hundred ninety-five million, five hundred ninety-one thousand, nine hundred seventy-two".