72050171 has 4 divisors (see below), whose sum is σ = 72067152. Its totient is φ = 72033192.

The previous prime is 72050159. The next prime is 72050177. The reversal of 72050171 is 17105027.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 17105027 = 277 ⋅61751.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72050171 is a prime.

It is a super-2 number, since 2×72050171² = 10382454282258482, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72050177) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3986 + ... + 12648.

It is an arithmetic number, because the mean of its divisors is an integer number (18016788).

Almost surely, 2^72050171 is an apocalyptic number.

72050171 is a deficient number, since it is larger than the sum of its proper divisors (16981).

72050171 is an equidigital number, since it uses as much as digits as its factorization.

72050171 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16980.

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

The square root of 72050171 is about 8488.2372139332. The cubic root of 72050171 is about 416.1133716982.

Adding to 72050171 its reverse (17105027), we get a palindrome (89155198).

The spelling of 72050171 in words is "seventy-two million, fifty thousand, one hundred seventy-one".