195340631 has 4 divisors (see below), whose sum is σ = 195398592. Its totient is φ = 195282672.

The previous prime is 195340597. The next prime is 195340657. The reversal of 195340631 is 136043591.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 136043591 = 19 ⋅7160189.

It is a cyclic number.

It is not a de Polignac number, because 195340631 - 2¹⁰ = 195339607 is a prime.

It is a super-2 number, since 2×195340631² = 76315924238956322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (195340661) 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, 23591 + ... + 30776.

It is an arithmetic number, because the mean of its divisors is an integer number (48849648).

Almost surely, 2^195340631 is an apocalyptic number.

195340631 is a deficient number, since it is larger than the sum of its proper divisors (57961).

195340631 is an equidigital number, since it uses as much as digits as its factorization.

195340631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57960.

The product of its (nonzero) digits is 9720, while the sum is 32.

The square root of 195340631 is about 13976.4312683889. The cubic root of 195340631 is about 580.2264583386.

The spelling of 195340631 in words is "one hundred ninety-five million, three hundred forty thousand, six hundred thirty-one".