221914229 has 2 divisors, whose sum is σ = 221914230. Its totient is φ = 221914228.

The previous prime is 221914211. The next prime is 221914237. The reversal of 221914229 is 922419122.

221914229 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 can be written as a sum of positive squares in only one way, i.e., 153190129 + 68724100 = 12377^2 + 8290^2 .

It is a cyclic number.

It is not a de Polignac number, because 221914229 - 2⁸ = 221913973 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 221914195 and 221914204.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221914249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110957114 + 110957115.

It is an arithmetic number, because the mean of its divisors is an integer number (110957115).

Almost surely, 2^221914229 is an apocalyptic number.

It is an amenable number.

221914229 is a deficient number, since it is larger than the sum of its proper divisors (1).

221914229 is an equidigital number, since it uses as much as digits as its factorization.

221914229 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5184, while the sum is 32.

The square root of 221914229 is about 14896.7858613863. The cubic root of 221914229 is about 605.4269044857.

The spelling of 221914229 in words is "two hundred twenty-one million, nine hundred fourteen thousand, two hundred twenty-nine".