80520191 has 8 divisors (see below), whose sum is σ = 82026000. Its totient is φ = 79019200.

The previous prime is 80520173. The next prime is 80520199. The reversal of 80520191 is 19102508.

It is a happy number.

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 80520191 - 2⁶ = 80520127 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 80520191.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80520199) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 61241 + ... + 62541.

It is an arithmetic number, because the mean of its divisors is an integer number (10253250).

Almost surely, 2^80520191 is an apocalyptic number.

80520191 is a deficient number, since it is larger than the sum of its proper divisors (1505809).

80520191 is a wasteful number, since it uses less digits than its factorization.

80520191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2409.

The product of its (nonzero) digits is 720, while the sum is 26.

The square root of 80520191 is about 8973.3043523554. The cubic root of 80520191 is about 431.8188523062.

Adding to 80520191 its reverse (19102508), we get a palindrome (99622699).

The spelling of 80520191 in words is "eighty million, five hundred twenty thousand, one hundred ninety-one".