225102171 has 8 divisors (see below), whose sum is σ = 343012864. Its totient is φ = 128629800.

The previous prime is 225102167. The next prime is 225102179. The reversal of 225102171 is 171201522.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 225102171 - 2² = 225102167 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 10719151 = 225102171 / (2 + 2 + 5 + 1 + 0 + 2 + 1 + 7 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (225102179) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5359555 + ... + 5359596.

It is an arithmetic number, because the mean of its divisors is an integer number (42876608).

Almost surely, 2^225102171 is an apocalyptic number.

225102171 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

225102171 is a deficient number, since it is larger than the sum of its proper divisors (117910693).

225102171 is a wasteful number, since it uses less digits than its factorization.

225102171 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10719161.

The product of its (nonzero) digits is 280, while the sum is 21.

The square root of 225102171 is about 15003.4053134613. The cubic root of 225102171 is about 608.3122485384.

Adding to 225102171 its reverse (171201522), we get a palindrome (396303693).

The spelling of 225102171 in words is "two hundred twenty-five million, one hundred two thousand, one hundred seventy-one".