80850521 has 8 divisors (see below), whose sum is σ = 88558920. Its totient is φ = 73470208.

The previous prime is 80850509. The next prime is 80850527. The reversal of 80850521 is 12505808.

It can be written as a sum of positive squares in 4 ways, for example, as 9211225 + 71639296 = 3035^2 + 8464^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 80850521 - 2⁶ = 80850457 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (80850527) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 81506 + ... + 82491.

It is an arithmetic number, because the mean of its divisors is an integer number (11069865).

Almost surely, 2^80850521 is an apocalyptic number.

It is an amenable number.

80850521 is a deficient number, since it is larger than the sum of its proper divisors (7708399).

80850521 is a wasteful number, since it uses less digits than its factorization.

80850521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164043.

The product of its (nonzero) digits is 3200, while the sum is 29.

The square root of 80850521 is about 8991.6917763011. The cubic root of 80850521 is about 432.4085516166.

The spelling of 80850521 in words is "eighty million, eight hundred fifty thousand, five hundred twenty-one".