195368381 has 8 divisors (see below), whose sum is σ = 211615320. Its totient is φ = 179295552.

The previous prime is 195368359. The next prime is 195368419. The reversal of 195368381 is 183863591.

It can be written as a sum of positive squares in 4 ways, for example, as 23522500 + 171845881 = 4850^2 + 13109^2 .

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 195368381 - 2¹⁰ = 195367357 is a prime.

It is a super-2 number, since 2×195368381² = 76337608589122322, 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 (195368311) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41186 + ... + 45683.

It is an arithmetic number, because the mean of its divisors is an integer number (26451915).

Almost surely, 2^195368381 is an apocalyptic number.

It is an amenable number.

195368381 is a deficient number, since it is larger than the sum of its proper divisors (16246939).

195368381 is a wasteful number, since it uses less digits than its factorization.

195368381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87055.

The product of its digits is 155520, while the sum is 44.

The square root of 195368381 is about 13977.4239758262. The cubic root of 195368381 is about 580.2539326054.

The spelling of 195368381 in words is "one hundred ninety-five million, three hundred sixty-eight thousand, three hundred eighty-one".