273030221 has 4 divisors (see below), whose sum is σ = 273187200. Its totient is φ = 272873244.

The previous prime is 273030187. The next prime is 273030223. The reversal of 273030221 is 122030372.

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-273030221 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 273030193 and 273030202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (273030223) 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, 75851 + ... + 79368.

It is an arithmetic number, because the mean of its divisors is an integer number (68296800).

Almost surely, 2^273030221 is an apocalyptic number.

It is an amenable number.

273030221 is a deficient number, since it is larger than the sum of its proper divisors (156979).

273030221 is a wasteful number, since it uses less digits than its factorization.

273030221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156978.

The product of its (nonzero) digits is 504, while the sum is 20.

The square root of 273030221 is about 16523.6261456134. The cubic root of 273030221 is about 648.7393483079.

Adding to 273030221 its reverse (122030372), we get a palindrome (395060593).

The spelling of 273030221 in words is "two hundred seventy-three million, thirty thousand, two hundred twenty-one".