195312500 has 36 divisors (see below), whose sum is σ = 427246092. Its totient is φ = 78125000.

The previous prime is 195312463. The next prime is 195312503. The reversal of 195312500 is 5213591.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in 6 ways, for example, as 27920656 + 167391844 = 5284^2 + 12938^2 .

It is a nialpdrome in base 5.

It is a self number, because there is not a number n which added to its sum of digits gives 195312500.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (195312503) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 39062498 + ... + 39062502.

It is an arithmetic number, because the mean of its divisors is an integer number (11867947).

Almost surely, 2^195312500 is an apocalyptic number.

195312500 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 195312500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (213623046).

195312500 is an abundant number, since it is smaller than the sum of its proper divisors (231933592).

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

195312500 is an frugal number, since it uses more digits than its factorization.

195312500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59 (or 7 counting only the distinct ones).

The product of its (nonzero) digits is 1350, while the sum is 26.

The square root of 195312500 is about 13975.4248593737. The cubic root of 195312500 is about 580.1986042016.

The spelling of 195312500 in words is "one hundred ninety-five million, three hundred twelve thousand, five hundred".