195021225 has 135 divisors (see below), whose sum is σ = 430073943. Its totient is φ = 84460320.

The previous prime is 195021193. The next prime is 195021251. The reversal of 195021225 is 522120591.

The square root of 195021225 is 13965.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 70207641 + 124813584 = 8379^2 + 11172^2 .

It is not a de Polignac number, because 195021225 - 2⁵ = 195021193 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 134 ways as a sum of consecutive naturals, for example, 10264266 + ... + 10264284.

Almost surely, 2^195021225 is an apocalyptic number.

195021225 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

195021225 is the 13965-th square number.

195021225 is the 6983-rd centered octagonal number.

It is an amenable number.

195021225 is an abundant number, since it is smaller than the sum of its proper divisors (235052718).

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

195021225 is an equidigital number, since it uses as much as digits as its factorization.

195021225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82 (or 34 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 27.

The cubic root of 195021225 is about 579.9100385640.

The spelling of 195021225 in words is "one hundred ninety-five million, twenty-one thousand, two hundred twenty-five".