80172111 has 8 divisors (see below), whose sum is σ = 107039664. Its totient is φ = 53376320.

The previous prime is 80172109. The next prime is 80172121. The reversal of 80172111 is 11127108.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 80172111 - 2¹ = 80172109 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80172101) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15276 + ... + 19841.

It is an arithmetic number, because the mean of its divisors is an integer number (13379958).

Almost surely, 2^80172111 is an apocalyptic number.

80172111 is a deficient number, since it is larger than the sum of its proper divisors (26867553).

80172111 is a wasteful number, since it uses less digits than its factorization.

80172111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35881.

The product of its (nonzero) digits is 112, while the sum is 21.

The square root of 80172111 is about 8953.8880381653. Note that the first 3 decimals coincide. The cubic root of 80172111 is about 431.1957182676.

Adding to 80172111 its reverse (11127108), we get a palindrome (91299219).

The spelling of 80172111 in words is "eighty million, one hundred seventy-two thousand, one hundred eleven".