172231000 has 64 divisors (see below), whose sum is σ = 416988000. Its totient is φ = 66505600.

The previous prime is 172230997. The next prime is 172231013. The reversal of 172231000 is 132271.

It is a happy number.

It is a super-2 number, since 2×172231000² = 59327034722000000, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26031 + ... + 31969.

Almost surely, 2^172231000 is an apocalyptic number.

172231000 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 172231000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (208494000).

172231000 is an abundant number, since it is smaller than the sum of its proper divisors (244757000).

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

172231000 is a wasteful number, since it uses less digits than its factorization.

172231000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5989 (or 5975 counting only the distinct ones).

The product of its (nonzero) digits is 84, while the sum is 16.

The square root of 172231000 is about 13123.6808860929. The cubic root of 172231000 is about 556.3786303543.

Adding to 172231000 its reverse (132271), we get a palindrome (172363271).

The spelling of 172231000 in words is "one hundred seventy-two million, two hundred thirty-one thousand".