80142221 has 4 divisors (see below), whose sum is σ = 80175744. Its totient is φ = 80108700.

The previous prime is 80142211. The next prime is 80142229. The reversal of 80142221 is 12224108.

It is a happy number.

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 not a de Polignac number, because 80142221 - 2¹⁰ = 80141197 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 80142193 and 80142202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80142229) 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, 12875 + ... + 18056.

It is an arithmetic number, because the mean of its divisors is an integer number (20043936).

Almost surely, 2^80142221 is an apocalyptic number.

It is an amenable number.

80142221 is a deficient number, since it is larger than the sum of its proper divisors (33523).

80142221 is a wasteful number, since it uses less digits than its factorization.

80142221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33522.

The product of its (nonzero) digits is 256, while the sum is 20.

The square root of 80142221 is about 8952.2187752534. The cubic root of 80142221 is about 431.1421250588.

Adding to 80142221 its reverse (12224108), we get a palindrome (92366329).

The spelling of 80142221 in words is "eighty million, one hundred forty-two thousand, two hundred twenty-one".