80912515 has 4 divisors (see below), whose sum is σ = 97095024. Its totient is φ = 64730008.

The previous prime is 80912479. The next prime is 80912527. The reversal of 80912515 is 51521908.

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 80912515 - 2⁹ = 80912003 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

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, 8091247 + ... + 8091256.

It is an arithmetic number, because the mean of its divisors is an integer number (24273756).

Almost surely, 2^80912515 is an apocalyptic number.

80912515 is a deficient number, since it is larger than the sum of its proper divisors (16182509).

80912515 is a wasteful number, since it uses less digits than its factorization.

80912515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16182508.

The product of its (nonzero) digits is 3600, while the sum is 31.

The square root of 80912515 is about 8995.1384091630. The cubic root of 80912515 is about 432.5190431211.

The spelling of 80912515 in words is "eighty million, nine hundred twelve thousand, five hundred fifteen".