225697100 has 36 divisors (see below), whose sum is σ = 518576184. Its totient is φ = 84967680.

The previous prime is 225697099. The next prime is 225697141. The reversal of 225697100 is 1796522.

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 11 ways as a sum of consecutive naturals, for example, 64682 + ... + 68081.

It is an arithmetic number, because the mean of its divisors is an integer number (14404894).

Almost surely, 2^225697100 is an apocalyptic number.

225697100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

225697100 is an abundant number, since it is smaller than the sum of its proper divisors (292879084).

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

225697100 is a wasteful number, since it uses less digits than its factorization.

225697100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132794 (or 132787 counting only the distinct ones).

The product of its (nonzero) digits is 7560, while the sum is 32.

The square root of 225697100 is about 15023.2186964046. The cubic root of 225697100 is about 608.8476857517.

The spelling of 225697100 in words is "two hundred twenty-five million, six hundred ninety-seven thousand, one hundred".