194531 has 4 divisors (see below), whose sum is σ = 205992. Its totient is φ = 183072.

The previous prime is 194527. The next prime is 194543. The reversal of 194531 is 135491.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 135491 = 157 ⋅863.

It is a cyclic number.

It is not a de Polignac number, because 194531 - 2² = 194527 is a prime.

It is a super-2 number, since 2×194531² = 75684619922, which contains 22 as substring.

It is a Duffinian number.

It is a nialpdrome in base 5.

It is a zygodrome in base 5.

It is a junction number, because it is equal to n+sod(n) for n = 194497 and 194506.

It is not an unprimeable number, because it can be changed into a prime (194521) 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 3 ways as a sum of consecutive naturals, for example, 5705 + ... + 5738.

It is an arithmetic number, because the mean of its divisors is an integer number (51498).

2¹⁹⁴⁵³¹ is an apocalyptic number.

194531 is a deficient number, since it is larger than the sum of its proper divisors (11461).

194531 is a wasteful number, since it uses less digits than its factorization.

194531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11460.

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

The square root of 194531 is about 441.0566856992. The cubic root of 194531 is about 57.9423724086.

The spelling of 194531 in words is "one hundred ninety-four thousand, five hundred thirty-one".