80627521 has 4 divisors (see below), whose sum is σ = 86829652. Its totient is φ = 74425392.

The previous prime is 80627509. The next prime is 80627527. The reversal of 80627521 is 12572608.

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

It can be written as a sum of positive squares in 2 ways, for example, as 7096896 + 73530625 = 2664^2 + 8575^2 .

It is a cyclic number.

It is not a de Polignac number, because 80627521 - 2²¹ = 78530369 is a prime.

It is not an unprimeable number, because it can be changed into a prime (80627527) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3101046 + ... + 3101071.

It is an arithmetic number, because the mean of its divisors is an integer number (21707413).

Almost surely, 2^80627521 is an apocalyptic number.

It is an amenable number.

80627521 is a deficient number, since it is larger than the sum of its proper divisors (6202131).

80627521 is a wasteful number, since it uses less digits than its factorization.

80627521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6202130.

The product of its (nonzero) digits is 6720, while the sum is 31.

The square root of 80627521 is about 8979.2828778249. The cubic root of 80627521 is about 432.0106325258.

The spelling of 80627521 in words is "eighty million, six hundred twenty-seven thousand, five hundred twenty-one".