195281251 has 4 divisors (see below), whose sum is σ = 213034104. Its totient is φ = 177528400.

The previous prime is 195281243. The next prime is 195281257. The reversal of 195281251 is 152182591.

195281251 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 195281251 - 2³ = 195281243 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (195281257) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8876410 + ... + 8876431.

It is an arithmetic number, because the mean of its divisors is an integer number (53258526).

Almost surely, 2^195281251 is an apocalyptic number.

195281251 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

195281251 is the 6250-th centered decagonal number.

195281251 is a deficient number, since it is larger than the sum of its proper divisors (17752853).

195281251 is a wasteful number, since it uses less digits than its factorization.

195281251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17752852.

The product of its digits is 7200, while the sum is 34.

The square root of 195281251 is about 13974.3068164399. The cubic root of 195281251 is about 580.1676596159.

The spelling of 195281251 in words is "one hundred ninety-five million, two hundred eighty-one thousand, two hundred fifty-one".