172227220 has 96 divisors (see below), whose sum is σ = 417021696. Its totient is φ = 59136000.

The previous prime is 172227173. The next prime is 172227233. The reversal of 172227220 is 22722271.

172227220 = T₁ + T₂ + ... + T₁₀₁₀.

172227220 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

172227220 is a nontrivial binomial coefficient, being equal to C(1012, 3).

It is a congruent number.

It is an unprimeable number.

It is the 1010-th tetrahedral number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 510892 + ... + 511228.

It is an arithmetic number, because the mean of its divisors is an integer number (4343976).

Almost surely, 2^172227220 is an apocalyptic number.

172227220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 172227220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (208510848).

172227220 is an abundant number, since it is smaller than the sum of its proper divisors (244794476).

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

172227220 is a wasteful number, since it uses less digits than its factorization.

172227220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 481 (or 479 counting only the distinct ones).

The product of its (nonzero) digits is 1568, while the sum is 25.

The square root of 172227220 is about 13123.5368708287. The cubic root of 172227220 is about 556.3745599942.

Adding to 172227220 its reverse (22722271), we get a palindrome (194949491).

It can be divided in two parts, 17222 and 7220, that added together give a palindrome (24442).

The spelling of 172227220 in words is "one hundred seventy-two million, two hundred twenty-seven thousand, two hundred twenty".