80511005 has 4 divisors (see below), whose sum is σ = 96613212. Its totient is φ = 64408800.

The previous prime is 80510993. The next prime is 80511023. The reversal of 80511005 is 50011508.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 22477081 + 58033924 = 4741^2 + 7618^2 .

It is not a de Polignac number, because 80511005 - 2²⁶ = 13402141 is a prime.

It is a super-2 number, since 2×80511005² = 12964043852220050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8051096 + ... + 8051105.

It is an arithmetic number, because the mean of its divisors is an integer number (24153303).

Almost surely, 2^80511005 is an apocalyptic number.

It is an amenable number.

80511005 is a deficient number, since it is larger than the sum of its proper divisors (16102207).

80511005 is a wasteful number, since it uses less digits than its factorization.

80511005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16102206.

The product of its (nonzero) digits is 200, while the sum is 20.

The square root of 80511005 is about 8972.7924861773. The cubic root of 80511005 is about 431.8024305914.

The spelling of 80511005 in words is "eighty million, five hundred eleven thousand, five".