195512257 has 24 divisors (see below), whose sum is σ = 217306880. Its totient is φ = 175668480.

The previous prime is 195512209. The next prime is 195512269. The reversal of 195512257 is 752215591.

It is not a de Polignac number, because 195512257 - 2¹⁵ = 195479489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (195512657) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1245223 + ... + 1245379.

Almost surely, 2^195512257 is an apocalyptic number.

195512257 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

195512257 is a deficient number, since it is larger than the sum of its proper divisors (21794623).

195512257 is a wasteful number, since it uses less digits than its factorization.

195512257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 361 (or 344 counting only the distinct ones).

The product of its digits is 31500, while the sum is 37.

The square root of 195512257 is about 13982.5697566649. The cubic root of 195512257 is about 580.3963373096.

The spelling of 195512257 in words is "one hundred ninety-five million, five hundred twelve thousand, two hundred fifty-seven".