221429041 has 2 divisors, whose sum is σ = 221429042. Its totient is φ = 221429040.

The previous prime is 221428997. The next prime is 221429077. The reversal of 221429041 is 140924122.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 221414400 + 14641 = 14880^2 + 121^2 .

It is a cyclic number.

It is not a de Polignac number, because 221429041 - 2⁷ = 221428913 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 221428997 and 221429015.

It is not a weakly prime, because it can be changed into another prime (221420041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110714520 + 110714521.

It is an arithmetic number, because the mean of its divisors is an integer number (110714521).

Almost surely, 2^221429041 is an apocalyptic number.

It is an amenable number.

221429041 is a deficient number, since it is larger than the sum of its proper divisors (1).

221429041 is an equidigital number, since it uses as much as digits as its factorization.

221429041 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1152, while the sum is 25.

The square root of 221429041 is about 14880.4919609534. The cubic root of 221429041 is about 604.9853521941.

The spelling of 221429041 in words is "two hundred twenty-one million, four hundred twenty-nine thousand, forty-one".