195021143 has 8 divisors (see below), whose sum is σ = 201901680. Its totient is φ = 188151040.

The previous prime is 195021139. The next prime is 195021173. The reversal of 195021143 is 341120591.

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 195021143 - 2² = 195021139 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (195021173) 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, 72071 + ... + 74727.

It is an arithmetic number, because the mean of its divisors is an integer number (25237710).

Almost surely, 2^195021143 is an apocalyptic number.

195021143 is a deficient number, since it is larger than the sum of its proper divisors (6880537).

195021143 is a wasteful number, since it uses less digits than its factorization.

195021143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5217.

The product of its (nonzero) digits is 1080, while the sum is 26.

The square root of 195021143 is about 13964.9970640885. The cubic root of 195021143 is about 579.9099572863.

The spelling of 195021143 in words is "one hundred ninety-five million, twenty-one thousand, one hundred forty-three".