221076013 has 2 divisors, whose sum is σ = 221076014. Its totient is φ = 221076012.

The previous prime is 221075989. The next prime is 221076043. The reversal of 221076013 is 310670122.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 216590089 + 4485924 = 14717^2 + 2118^2 .

It is a cyclic number.

It is not a de Polignac number, because 221076013 - 2⁹ = 221075501 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221076043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110538006 + 110538007.

It is an arithmetic number, because the mean of its divisors is an integer number (110538007).

Almost surely, 2^221076013 is an apocalyptic number.

It is an amenable number.

221076013 is a deficient number, since it is larger than the sum of its proper divisors (1).

221076013 is an equidigital number, since it uses as much as digits as its factorization.

221076013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 504, while the sum is 22.

The square root of 221076013 is about 14868.6251213755. The cubic root of 221076013 is about 604.6636684445.

The spelling of 221076013 in words is "two hundred twenty-one million, seventy-six thousand, thirteen".