172227620 has 12 divisors (see below), whose sum is σ = 361678044. Its totient is φ = 68891040.

The previous prime is 172227589. The next prime is 172227623. The reversal of 172227620 is 26722271.

It can be written as a sum of positive squares in 2 ways, for example, as 135163876 + 37063744 = 11626^2 + 6088^2 .

It is not an unprimeable number, because it can be changed into a prime (172227623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4305671 + ... + 4305710.

It is an arithmetic number, because the mean of its divisors is an integer number (30139837).

Almost surely, 2^172227620 is an apocalyptic number.

172227620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

172227620 is an abundant number, since it is smaller than the sum of its proper divisors (189450424).

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

172227620 is a wasteful number, since it uses less digits than its factorization.

172227620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8611390 (or 8611388 counting only the distinct ones).

The product of its (nonzero) digits is 4704, while the sum is 29.

The square root of 172227620 is about 13123.5521106140. The cubic root of 172227620 is about 556.3749907229.

Adding to 172227620 its reverse (26722271), we get a palindrome (198949891).

It can be divided in two parts, 17222 and 7620, that added together give a palindrome (24842).

The spelling of 172227620 in words is "one hundred seventy-two million, two hundred twenty-seven thousand, six hundred twenty".