195315281 has 4 divisors (see below), whose sum is σ = 223217472. Its totient is φ = 167413092.

The previous prime is 195315259. The next prime is 195315293. The reversal of 195315281 is 182513591.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 195315281 - 2¹⁰ = 195314257 is a prime.

It is a super-2 number, since 2×195315281² = 76296117984217922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (195315181) 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, 13951085 + ... + 13951098.

It is an arithmetic number, because the mean of its divisors is an integer number (55804368).

Almost surely, 2^195315281 is an apocalyptic number.

It is an amenable number.

195315281 is a deficient number, since it is larger than the sum of its proper divisors (27902191).

195315281 is an equidigital number, since it uses as much as digits as its factorization.

195315281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27902190.

The product of its digits is 10800, while the sum is 35.

The square root of 195315281 is about 13975.5243551002. The cubic root of 195315281 is about 580.2013579504.

The spelling of 195315281 in words is "one hundred ninety-five million, three hundred fifteen thousand, two hundred eighty-one".