172011006 has 32 divisors (see below), whose sum is σ = 395431200. Its totient is φ = 55359360.

The previous prime is 172011001. The next prime is 172011011. The reversal of 172011006 is 600110271.

It is an interprime number because it is at equal distance from previous prime (172011001) and next prime (172011011).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a self number, because there is not a number n which added to its sum of digits gives 172011006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172011001) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 53355 + ... + 56486.

It is an arithmetic number, because the mean of its divisors is an integer number (12357225).

Almost surely, 2^172011006 is an apocalyptic number.

172011006 is an abundant number, since it is smaller than the sum of its proper divisors (223420194).

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

172011006 is a wasteful number, since it uses less digits than its factorization.

172011006 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109881 (or 109875 counting only the distinct ones).

The product of its (nonzero) digits is 84, while the sum is 18.

The square root of 172011006 is about 13115.2966417081. The cubic root of 172011006 is about 556.1416383455.

Adding to 172011006 its reverse (600110271), we get a palindrome (772121277).

The spelling of 172011006 in words is "one hundred seventy-two million, eleven thousand, six".