72171050 has 24 divisors (see below), whose sum is σ = 153415776. Its totient is φ = 24744240.

The previous prime is 72171041. The next prime is 72171061. The reversal of 72171050 is 5017127.

It is a happy number.

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 11 ways as a sum of consecutive naturals, for example, 102752 + ... + 103451.

It is an arithmetic number, because the mean of its divisors is an integer number (6392324).

Almost surely, 2^72171050 is an apocalyptic number.

72171050 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

72171050 is an abundant number, since it is smaller than the sum of its proper divisors (81244726).

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

72171050 is a wasteful number, since it uses less digits than its factorization.

72171050 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 206222 (or 206217 counting only the distinct ones).

The product of its (nonzero) digits is 490, while the sum is 23.

The square root of 72171050 is about 8495.3546129635. The cubic root of 72171050 is about 416.3459469744.

Adding to 72171050 its reverse (5017127), we get a palindrome (77188177).

The spelling of 72171050 in words is "seventy-two million, one hundred seventy-one thousand, fifty".