272221643 has 2 divisors, whose sum is σ = 272221644. Its totient is φ = 272221642.

The previous prime is 272221639. The next prime is 272221699. The reversal of 272221643 is 346122272.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 272221643 - 2² = 272221639 is a prime.

It is a Sophie Germain prime.

It is equal to p_14825603 and since 272221643 and 14825603 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (272221343) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 136110821 + 136110822.

It is an arithmetic number, because the mean of its divisors is an integer number (136110822).

Almost surely, 2^272221643 is an apocalyptic number.

272221643 is a deficient number, since it is larger than the sum of its proper divisors (1).

272221643 is an equidigital number, since it uses as much as digits as its factorization.

272221643 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8064, while the sum is 29.

The square root of 272221643 is about 16499.1406745927. The cubic root of 272221643 is about 648.0983020037.

The spelling of 272221643 in words is "two hundred seventy-two million, two hundred twenty-one thousand, six hundred forty-three".