80212815 has 32 divisors (see below), whose sum is σ = 143674560. Its totient is φ = 42458112.

The previous prime is 80212807. The next prime is 80212837. The reversal of 80212815 is 51821208.

It is not a de Polignac number, because 80212815 - 2³ = 80212807 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 16327 + ... + 20663.

It is an arithmetic number, because the mean of its divisors is an integer number (4489830).

Almost surely, 2^80212815 is an apocalyptic number.

80212815 is a deficient number, since it is larger than the sum of its proper divisors (63461745).

80212815 is a wasteful number, since it uses less digits than its factorization.

80212815 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4488 (or 4482 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 27.

The square root of 80212815 is about 8956.1607287945. The cubic root of 80212815 is about 431.2686797202.

The spelling of 80212815 in words is "eighty million, two hundred twelve thousand, eight hundred fifteen".