80521323 has 4 divisors (see below), whose sum is σ = 107361768. Its totient is φ = 53680880.

The previous prime is 80521319. The next prime is 80521351. The reversal of 80521323 is 32312508.

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 80521323 - 2² = 80521319 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 80521293 and 80521302.

It is not an unprimeable number, because it can be changed into a prime (80521223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13420218 + ... + 13420223.

It is an arithmetic number, because the mean of its divisors is an integer number (26840442).

Almost surely, 2^80521323 is an apocalyptic number.

80521323 is a deficient number, since it is larger than the sum of its proper divisors (26840445).

80521323 is a wasteful number, since it uses less digits than its factorization.

80521323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26840444.

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 80521323 is about 8973.3674281175. The cubic root of 80521323 is about 431.8208758841.

The spelling of 80521323 in words is "eighty million, five hundred twenty-one thousand, three hundred twenty-three".