195651 has 6 divisors (see below), whose sum is σ = 282620. Its totient is φ = 130428.

The previous prime is 195599. The next prime is 195659. The reversal of 195651 is 156591.

195651 is a `hidden beast` number, since 1 + 9 + 5 + 651 = 666.

It is not a de Polignac number, because 195651 - 2¹¹ = 193603 is a prime.

It is a Duffinian number.

195651 is a lucky number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 195651.

It is not an unprimeable number, because it can be changed into a prime (195659) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 10861 + ... + 10878.

2¹⁹⁵⁶⁵¹ is an apocalyptic number.

195651 is a deficient number, since it is larger than the sum of its proper divisors (86969).

195651 is a wasteful number, since it uses less digits than its factorization.

195651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21745 (or 21742 counting only the distinct ones).

The product of its digits is 1350, while the sum is 27.

The square root of 195651 is about 442.3245414851. The cubic root of 195651 is about 58.0533595351.

Subtracting from 195651 its reverse (156591), we obtain a triangular number (39060 = T₂₇₉).

The spelling of 195651 in words is "one hundred ninety-five thousand, six hundred fifty-one".