80172557 has 4 divisors (see below), whose sum is σ = 80256096. Its totient is φ = 80089020.

The previous prime is 80172551. The next prime is 80172569. The reversal of 80172557 is 75527108.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 80172557 - 2¹² = 80168461 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80172551) 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 3 ways as a sum of consecutive naturals, for example, 40313 + ... + 42254.

It is an arithmetic number, because the mean of its divisors is an integer number (20064024).

Almost surely, 2^80172557 is an apocalyptic number.

It is an amenable number.

80172557 is a deficient number, since it is larger than the sum of its proper divisors (83539).

80172557 is an equidigital number, since it uses as much as digits as its factorization.

80172557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83538.

The product of its (nonzero) digits is 19600, while the sum is 35.

The square root of 80172557 is about 8953.9129435125. The cubic root of 80172557 is about 431.1965178513.

The spelling of 80172557 in words is "eighty million, one hundred seventy-two thousand, five hundred fifty-seven".