221342659 has 2 divisors, whose sum is σ = 221342660. Its totient is φ = 221342658.

The previous prime is 221342591. The next prime is 221342683. The reversal of 221342659 is 956243122.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 221342659 - 2⁷ = 221342531 is a prime.

It is not a weakly prime, because it can be changed into another prime (221342959) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110671329 + 110671330.

It is an arithmetic number, because the mean of its divisors is an integer number (110671330).

Almost surely, 2^221342659 is an apocalyptic number.

221342659 is a deficient number, since it is larger than the sum of its proper divisors (1).

221342659 is an equidigital number, since it uses as much as digits as its factorization.

221342659 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 25920, while the sum is 34.

The square root of 221342659 is about 14877.5891528164. The cubic root of 221342659 is about 604.9066713947.

The spelling of 221342659 in words is "two hundred twenty-one million, three hundred forty-two thousand, six hundred fifty-nine".