197285251 has 8 divisors (see below), whose sum is σ = 198633600. Its totient is φ = 195941760.

The previous prime is 197285213. The next prime is 197285269. The reversal of 197285251 is 152582791.

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 197285251 - 2¹⁵ = 197252483 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (197285281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 114585 + ... + 116293.

It is an arithmetic number, because the mean of its divisors is an integer number (24829200).

Almost surely, 2^197285251 is an apocalyptic number.

197285251 is a deficient number, since it is larger than the sum of its proper divisors (1348349).

197285251 is a wasteful number, since it uses less digits than its factorization.

197285251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2429.

The product of its digits is 50400, while the sum is 40.

The square root of 197285251 is about 14045.8268179556. The cubic root of 197285251 is about 582.1454931224.

The spelling of 197285251 in words is "one hundred ninety-seven million, two hundred eighty-five thousand, two hundred fifty-one".