172200000 has 336 divisors, whose sum is σ = 666707328. Its totient is φ = 38400000.

The previous prime is 172199981. The next prime is 172200019. The reversal of 172200000 is 2271.

It is an interprime number because it is at equal distance from previous prime (172199981) and next prime (172200019).

It is a tau number, because it is divible by the number of its divisors (336).

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4199980 + ... + 4200020.

It is an arithmetic number, because the mean of its divisors is an integer number (1984248).

Almost surely, 2^172200000 is an apocalyptic number.

172200000 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 172200000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (333353664).

172200000 is an abundant number, since it is smaller than the sum of its proper divisors (494507328).

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

172200000 is an frugal number, since it uses more digits than its factorization.

172200000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88 (or 58 counting only the distinct ones).

The product of its (nonzero) digits is 28, while the sum is 12.

The square root of 172200000 is about 13122.4997618594. The cubic root of 172200000 is about 556.3452473349.

Adding to 172200000 its reverse (2271), we get a palindrome (172202271).

The spelling of 172200000 in words is "one hundred seventy-two million, two hundred thousand".