80381221 has 4 divisors (see below), whose sum is σ = 81014272. Its totient is φ = 79748172.

The previous prime is 80381209. The next prime is 80381261. The reversal of 80381221 is 12218308.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-80381221 is a prime.

It is a super-2 number, since 2×80381221² = 12922281378901682, 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 (80381201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 316335 + ... + 316588.

It is an arithmetic number, because the mean of its divisors is an integer number (20253568).

Almost surely, 2^80381221 is an apocalyptic number.

It is an amenable number.

80381221 is a deficient number, since it is larger than the sum of its proper divisors (633051).

80381221 is a wasteful number, since it uses less digits than its factorization.

80381221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 633050.

The product of its (nonzero) digits is 768, while the sum is 25.

The square root of 80381221 is about 8965.5574840609. The cubic root of 80381221 is about 431.5702835020.

Adding to 80381221 its reverse (12218308), we get a palindrome (92599529).

The spelling of 80381221 in words is "eighty million, three hundred eighty-one thousand, two hundred twenty-one".