195390431 has 8 divisors (see below), whose sum is σ = 196745328. Its totient is φ = 194040000.

The previous prime is 195390353. The next prime is 195390449. The reversal of 195390431 is 134093591.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-195390431 is a prime.

It is a super-2 number, since 2×195390431² = 76354841052731522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 195390391 and 195390400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (195390491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 147251 + ... + 148571.

It is an arithmetic number, because the mean of its divisors is an integer number (24593166).

Almost surely, 2^195390431 is an apocalyptic number.

195390431 is a deficient number, since it is larger than the sum of its proper divisors (1354897).

195390431 is a wasteful number, since it uses less digits than its factorization.

195390431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2233.

The product of its (nonzero) digits is 14580, while the sum is 35.

The square root of 195390431 is about 13978.2127255240. The cubic root of 195390431 is about 580.2757616544.

The spelling of 195390431 in words is "one hundred ninety-five million, three hundred ninety thousand, four hundred thirty-one".