80505715 has 4 divisors (see below), whose sum is σ = 96606864. Its totient is φ = 64404568.

The previous prime is 80505697. The next prime is 80505749. The reversal of 80505715 is 51750508.

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

It is a cyclic number.

It is not a de Polignac number, because 80505715 - 2¹⁵ = 80472947 is a prime.

It is a super-2 number, since 2×80505715² = 12962340295322450, which contains 22 as substring.

It is a Duffinian 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, 8050567 + ... + 8050576.

It is an arithmetic number, because the mean of its divisors is an integer number (24151716).

Almost surely, 2^80505715 is an apocalyptic number.

80505715 is a deficient number, since it is larger than the sum of its proper divisors (16101149).

80505715 is a wasteful number, since it uses less digits than its factorization.

80505715 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16101148.

The product of its (nonzero) digits is 7000, while the sum is 31.

The square root of 80505715 is about 8972.4977013093. The cubic root of 80505715 is about 431.7929731477.

The spelling of 80505715 in words is "eighty million, five hundred five thousand, seven hundred fifteen".