80361221 has 4 divisors (see below), whose sum is σ = 80387244. Its totient is φ = 80335200.

The previous prime is 80361199. The next prime is 80361251. The reversal of 80361221 is 12216308.

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 33930625 + 46430596 = 5825^2 + 6814^2 .

It is a cyclic number.

It is not a de Polignac number, because 80361221 - 2⁶ = 80361157 is a prime.

It is a super-2 number, since 2×80361221² = 12915851681221682, 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 (80361251) 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, 7640 + ... + 14801.

It is an arithmetic number, because the mean of its divisors is an integer number (20096811).

Almost surely, 2^80361221 is an apocalyptic number.

It is an amenable number.

80361221 is a deficient number, since it is larger than the sum of its proper divisors (26023).

80361221 is a wasteful number, since it uses less digits than its factorization.

80361221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26022.

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 80361221 is about 8964.4420350628. The cubic root of 80361221 is about 431.5344869086.

Adding to 80361221 its reverse (12216308), we get a palindrome (92577529).

The spelling of 80361221 in words is "eighty million, three hundred sixty-one thousand, two hundred twenty-one".