195431 has 8 divisors (see below), whose sum is σ = 211680. Its totient is φ = 179872.

The previous prime is 195427. The next prime is 195443. The reversal of 195431 is 134591.

It is a happy number.

195431 is nontrivially palindromic in base 14.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 195431 - 2² = 195427 is a prime.

It is a super-2 number, since 2×195431² = 76386551522, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 195397 and 195406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (195401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 521 + ... + 813.

It is an arithmetic number, because the mean of its divisors is an integer number (26460).

2¹⁹⁵⁴³¹ is an apocalyptic number.

195431 is a deficient number, since it is larger than the sum of its proper divisors (16249).

195431 is a wasteful number, since it uses less digits than its factorization.

195431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 345.

The product of its digits is 540, while the sum is 23.

The square root of 195431 is about 442.0757853581. The cubic root of 195431 is about 58.0315919845.

It can be divided in two parts, 195 and 431, that added together give a palindrome (626).

The spelling of 195431 in words is "one hundred ninety-five thousand, four hundred thirty-one".