225171100 has 72 divisors (see below), whose sum is σ = 609211008. Its totient is φ = 70180800.

The previous prime is 225171077. The next prime is 225171119. The reversal of 225171100 is 1171522.

It is a congruent number.

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 23 ways as a sum of consecutive naturals, for example, 6922 + ... + 22321.

It is an arithmetic number, because the mean of its divisors is an integer number (8461264).

Almost surely, 2^225171100 is an apocalyptic number.

225171100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

225171100 is an abundant number, since it is smaller than the sum of its proper divisors (384039908).

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

225171100 is a wasteful number, since it uses less digits than its factorization.

225171100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29275 (or 29268 counting only the distinct ones).

The product of its (nonzero) digits is 140, while the sum is 19.

The square root of 225171100 is about 15005.7022494784. The cubic root of 225171100 is about 608.3743330512.

The spelling of 225171100 in words is "two hundred twenty-five million, one hundred seventy-one thousand, one hundred".