221003413 has 2 divisors, whose sum is σ = 221003414. Its totient is φ = 221003412.

The previous prime is 221003411. The next prime is 221003423. The reversal of 221003413 is 314300122.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 198894609 + 22108804 = 14103^2 + 4702^2 .

It is a cyclic number.

It is not a de Polignac number, because 221003413 - 2¹ = 221003411 is a prime.

Together with 221003411, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221003411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110501706 + 110501707.

It is an arithmetic number, because the mean of its divisors is an integer number (110501707).

Almost surely, 2^221003413 is an apocalyptic number.

It is an amenable number.

221003413 is a deficient number, since it is larger than the sum of its proper divisors (1).

221003413 is an equidigital number, since it uses as much as digits as its factorization.

221003413 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 221003413 is about 14866.1835384876. The cubic root of 221003413 is about 604.5974719239.

Adding to 221003413 its reverse (314300122), we get a palindrome (535303535).

The spelling of 221003413 in words is "two hundred twenty-one million, three thousand, four hundred thirteen".