172150566 has 64 divisors (see below), whose sum is σ = 412895232. Its totient is φ = 46818432.

The previous prime is 172150553. The next prime is 172150579. The reversal of 172150566 is 665051271.

It is an interprime number because it is at equal distance from previous prime (172150553) and next prime (172150579).

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 71860 + ... + 74216.

It is an arithmetic number, because the mean of its divisors is an integer number (6451488).

Almost surely, 2^172150566 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 172150566, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (206447616).

172150566 is an abundant number, since it is smaller than the sum of its proper divisors (240744666).

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

172150566 is a wasteful number, since it uses less digits than its factorization.

172150566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2453.

The product of its (nonzero) digits is 12600, while the sum is 33.

The square root of 172150566 is about 13120.6160678529. The cubic root of 172150566 is about 556.2920049751.

The spelling of 172150566 in words is "one hundred seventy-two million, one hundred fifty thousand, five hundred sixty-six".