172022000 has 40 divisors (see below), whose sum is σ = 415954032. Its totient is φ = 68808000.

The previous prime is 172021999. The next prime is 172022009. The reversal of 172022000 is 220271.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172022009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41006 + ... + 45005.

Almost surely, 2^172022000 is an apocalyptic number.

172022000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

172022000 is an abundant number, since it is smaller than the sum of its proper divisors (243932032).

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

172022000 is an equidigital number, since it uses as much as digits as its factorization.

172022000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86034 (or 86018 counting only the distinct ones).

The product of its (nonzero) digits is 56, while the sum is 14.

The square root of 172022000 is about 13115.7157639223. The cubic root of 172022000 is about 556.1534866007.

Adding to 172022000 its reverse (220271), we get a palindrome (172242271).

The spelling of 172022000 in words is "one hundred seventy-two million, twenty-two thousand".