172090550 has 12 divisors (see below), whose sum is σ = 320088516. Its totient is φ = 68836200.

The previous prime is 172090549. The next prime is 172090559. The reversal of 172090550 is 55090271.

It is a hoax number, since the sum of its digits (29) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172090559) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 1720856 + ... + 1720955.

It is an arithmetic number, because the mean of its divisors is an integer number (26674043).

Almost surely, 2^172090550 is an apocalyptic number.

172090550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

172090550 is a deficient number, since it is larger than the sum of its proper divisors (147997966).

172090550 is a wasteful number, since it uses less digits than its factorization.

172090550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3441823 (or 3441818 counting only the distinct ones).

The product of its (nonzero) digits is 3150, while the sum is 29.

The square root of 172090550 is about 13118.3287807556. The cubic root of 172090550 is about 556.2273516849.

The spelling of 172090550 in words is "one hundred seventy-two million, ninety thousand, five hundred fifty".