172220533850 has 24 divisors (see below), whose sum is σ = 320349743328. Its totient is φ = 68884009200.

The previous prime is 172220533817. The next prime is 172220533867. The reversal of 172220533850 is 58335022271.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 799397 + ... + 991703.

It is an arithmetic number, because the mean of its divisors is an integer number (13347905972).

Almost surely, 2^172220533850 is an apocalyptic number.

172220533850 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

172220533850 is a deficient number, since it is larger than the sum of its proper divisors (148129209478).

172220533850 is a wasteful number, since it uses less digits than its factorization.

172220533850 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 210230 (or 210225 counting only the distinct ones).

The product of its (nonzero) digits is 100800, while the sum is 38.

The spelling of 172220533850 in words is "one hundred seventy-two billion, two hundred twenty million, five hundred thirty-three thousand, eight hundred fifty".