195217420 has 36 divisors (see below), whose sum is σ = 419791680. Its totient is φ = 76256544.

The previous prime is 195217417. The next prime is 195217423. The reversal of 195217420 is 24712591.

It is an interprime number because it is at equal distance from previous prime (195217417) and next prime (195217423).

It is not an unprimeable number, because it can be changed into a prime (195217423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 34341 + ... + 39619.

It is an arithmetic number, because the mean of its divisors is an integer number (11660880).

Almost surely, 2^195217420 is an apocalyptic number.

195217420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 195217420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (209895840).

195217420 is an abundant number, since it is smaller than the sum of its proper divisors (224574260).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

195217420 is a wasteful number, since it uses less digits than its factorization.

195217420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5374 (or 5329 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 31.

The square root of 195217420 is about 13972.0227597868. The cubic root of 195217420 is about 580.1044401698.

The spelling of 195217420 in words is "one hundred ninety-five million, two hundred seventeen thousand, four hundred twenty".