281195225 has 6 divisors (see below), whose sum is σ = 348682110. Its totient is φ = 224956160.

The previous prime is 281195221. The next prime is 281195273. The reversal of 281195225 is 522591182.

It can be written as a sum of positive squares in 3 ways, for example, as 69288976 + 211906249 = 8324^2 + 14557^2 .

It is not a de Polignac number, because 281195225 - 2² = 281195221 is a prime.

It is not an unprimeable number, because it can be changed into a prime (281195221) 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 5 ways as a sum of consecutive naturals, for example, 5623880 + ... + 5623929.

It is an arithmetic number, because the mean of its divisors is an integer number (58113685).

Almost surely, 2^281195225 is an apocalyptic number.

281195225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

281195225 is a deficient number, since it is larger than the sum of its proper divisors (67486885).

281195225 is a wasteful number, since it uses less digits than its factorization.

281195225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11247819 (or 11247814 counting only the distinct ones).

The product of its digits is 14400, while the sum is 35.

The square root of 281195225 is about 16768.8766767485. The cubic root of 281195225 is about 655.1428121285.

The spelling of 281195225 in words is "two hundred eighty-one million, one hundred ninety-five thousand, two hundred twenty-five".