197815625 has 24 divisors (see below), whose sum is σ = 282606912. Its totient is φ = 135630000.

The previous prime is 197815591. The next prime is 197815627. The reversal of 197815625 is 526518791.

It is not a de Polignac number, because 197815625 - 2²⁰ = 196767049 is a prime.

It is not an unprimeable number, because it can be changed into a prime (197815627) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 17354 + ... + 26396.

It is an arithmetic number, because the mean of its divisors is an integer number (11775288).

Almost surely, 2^197815625 is an apocalyptic number.

It is an amenable number.

197815625 is a deficient number, since it is larger than the sum of its proper divisors (84791287).

197815625 is an frugal number, since it uses more digits than its factorization.

197815625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9075 (or 9055 counting only the distinct ones).

The product of its digits is 151200, while the sum is 44.

The square root of 197815625 is about 14064.6942732503. The cubic root of 197815625 is about 582.6666987763. Note that the first 4 decimals are identical.

The spelling of 197815625 in words is "one hundred ninety-seven million, eight hundred fifteen thousand, six hundred twenty-five".