195208251 has 16 divisors (see below), whose sum is σ = 307718400. Its totient is φ = 107700768.

The previous prime is 195208231. The next prime is 195208439. The reversal of 195208251 is 152802591.

195208251 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 195208251 - 2⁵ = 195208219 is a prime.

It is a super-2 number, since 2×195208251² = 76212522516958002, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (195208201) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 159661 + ... + 160878.

It is an arithmetic number, because the mean of its divisors is an integer number (19232400).

Almost surely, 2^195208251 is an apocalyptic number.

195208251 is a deficient number, since it is larger than the sum of its proper divisors (112510149).

195208251 is a wasteful number, since it uses less digits than its factorization.

195208251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 320578.

The product of its (nonzero) digits is 7200, while the sum is 33.

The square root of 195208251 is about 13971.6946359416. The cubic root of 195208251 is about 580.0953578846.

The spelling of 195208251 in words is "one hundred ninety-five million, two hundred eight thousand, two hundred fifty-one".