225021310172 has 6 divisors (see below), whose sum is σ = 393787292808. Its totient is φ = 112510655084.

The previous prime is 225021310123. The next prime is 225021310187. The reversal of 225021310172 is 271013120522.

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 as a sum of consecutive naturals, namely, 28127663768 + ... + 28127663775.

It is an arithmetic number, because the mean of its divisors is an integer number (65631215468).

Almost surely, 2^225021310172 is an apocalyptic number.

It is an amenable number.

225021310172 is a deficient number, since it is larger than the sum of its proper divisors (168765982636).

225021310172 is a wasteful number, since it uses less digits than its factorization.

225021310172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56255327547 (or 56255327545 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 26.

Adding to 225021310172 its reverse (271013120522), we get a palindrome (496034430694).

The spelling of 225021310172 in words is "two hundred twenty-five billion, twenty-one million, three hundred ten thousand, one hundred seventy-two".