80457221 has 4 divisors (see below), whose sum is σ = 86646252. Its totient is φ = 74268192.

The previous prime is 80457173. The next prime is 80457227. The reversal of 80457221 is 12275408.

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 44289025 + 36168196 = 6655^2 + 6014^2 .

It is a cyclic number.

It is not a de Polignac number, because 80457221 - 2¹⁰ = 80456197 is a prime.

It is a super-2 number, since 2×80457221² = 12946728822085682, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80457227) 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, 3094496 + ... + 3094521.

It is an arithmetic number, because the mean of its divisors is an integer number (21661563).

Almost surely, 2^80457221 is an apocalyptic number.

It is an amenable number.

80457221 is a deficient number, since it is larger than the sum of its proper divisors (6189031).

80457221 is a wasteful number, since it uses less digits than its factorization.

80457221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6189030.

The product of its (nonzero) digits is 4480, while the sum is 29.

The square root of 80457221 is about 8969.7949251920. The cubic root of 80457221 is about 431.7062564294.

The spelling of 80457221 in words is "eighty million, four hundred fifty-seven thousand, two hundred twenty-one".