221524312005172 has 48 divisors (see below), whose sum is σ = 425763617832000. Its totient is φ = 100013496629760.

The previous prime is 221524312005091. The next prime is 221524312005187. The reversal of 221524312005172 is 271500213425122.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 186930604 + ... + 188111932.

It is an arithmetic number, because the mean of its divisors is an integer number (8870075371500).

Almost surely, 2^{221524312005172} is an apocalyptic number.

221524312005172 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

221524312005172 is a deficient number, since it is larger than the sum of its proper divisors (204239305826828).

221524312005172 is a wasteful number, since it uses less digits than its factorization.

221524312005172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1210096 (or 1210094 counting only the distinct ones).

The product of its (nonzero) digits is 67200, while the sum is 37.

The spelling of 221524312005172 in words is "two hundred twenty-one trillion, five hundred twenty-four billion, three hundred twelve million, five thousand, one hundred seventy-two".