221343107 has 2 divisors, whose sum is σ = 221343108. Its totient is φ = 221343106.

The previous prime is 221343097. The next prime is 221343113. The reversal of 221343107 is 701343122.

221343107 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221343107 is a prime.

It is not a weakly prime, because it can be changed into another prime (221343127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110671553 + 110671554.

It is an arithmetic number, because the mean of its divisors is an integer number (110671554).

Almost surely, 2^221343107 is an apocalyptic number.

221343107 is a deficient number, since it is larger than the sum of its proper divisors (1).

221343107 is an equidigital number, since it uses as much as digits as its factorization.

221343107 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1008, while the sum is 23.

The square root of 221343107 is about 14877.6042090116. The cubic root of 221343107 is about 604.9070795070.

Adding to 221343107 its reverse (701343122), we get a palindrome (922686229).

The spelling of 221343107 in words is "two hundred twenty-one million, three hundred forty-three thousand, one hundred seven".