80542815 has 16 divisors (see below), whose sum is σ = 129007968. Its totient is φ = 42909696.

The previous prime is 80542811. The next prime is 80542841. The reversal of 80542815 is 51824508.

It is not a de Polignac number, because 80542815 - 2² = 80542811 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80542811) 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 15 ways as a sum of consecutive naturals, for example, 14967 + ... + 19623.

It is an arithmetic number, because the mean of its divisors is an integer number (8062998).

Almost surely, 2^80542815 is an apocalyptic number.

80542815 is a deficient number, since it is larger than the sum of its proper divisors (48465153).

80542815 is a wasteful number, since it uses less digits than its factorization.

80542815 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5818.

The product of its (nonzero) digits is 12800, while the sum is 33.

The square root of 80542815 is about 8974.5648919599. The cubic root of 80542815 is about 431.8592916658.

The spelling of 80542815 in words is "eighty million, five hundred forty-two thousand, eight hundred fifteen".