195919281 has 12 divisors (see below), whose sum is σ = 284419200. Its totient is φ = 129955320.

The previous prime is 195919261. The next prime is 195919291. The reversal of 195919281 is 182919591.

It is not a de Polignac number, because 195919281 - 2⁷ = 195919153 is a prime.

It is a super-2 number, since 2×195919281² = 76768729335113922, which contains 22 as substring.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (195919211) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 52905 + ... + 56486.

It is an arithmetic number, because the mean of its divisors is an integer number (23701600).

Almost surely, 2^195919281 is an apocalyptic number.

It is an amenable number.

195919281 is a deficient number, since it is larger than the sum of its proper divisors (88499919).

195919281 is a wasteful number, since it uses less digits than its factorization.

195919281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109596 (or 109593 counting only the distinct ones).

The product of its digits is 58320, while the sum is 45.

The square root of 195919281 is about 13997.1168817010. The cubic root of 195919281 is about 580.7988210168.

The spelling of 195919281 in words is "one hundred ninety-five million, nine hundred nineteen thousand, two hundred eighty-one".