172220146220 has 12 divisors (see below), whose sum is σ = 361662307104. Its totient is φ = 68888058480.

The previous prime is 172220146201. The next prime is 172220146253. The reversal of 172220146220 is 22641022271.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4305503636 + ... + 4305503675.

It is an arithmetic number, because the mean of its divisors is an integer number (30138525592).

Almost surely, 2^172220146220 is an apocalyptic number.

172220146220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

172220146220 is an abundant number, since it is smaller than the sum of its proper divisors (189442160884).

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

172220146220 is a wasteful number, since it uses less digits than its factorization.

172220146220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8611007320 (or 8611007318 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 29.

Adding to 172220146220 its reverse (22641022271), we get a palindrome (194861168491).

The spelling of 172220146220 in words is "one hundred seventy-two billion, two hundred twenty million, one hundred forty-six thousand, two hundred twenty".