221434007 has 2 divisors, whose sum is σ = 221434008. Its totient is φ = 221434006.

The previous prime is 221434001. The next prime is 221434049. The reversal of 221434007 is 700434122.

221434007 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 221434007 - 2⁴ = 221433991 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221434001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110717003 + 110717004.

It is an arithmetic number, because the mean of its divisors is an integer number (110717004).

Almost surely, 2^221434007 is an apocalyptic number.

221434007 is a deficient number, since it is larger than the sum of its proper divisors (1).

221434007 is an equidigital number, since it uses as much as digits as its factorization.

221434007 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1344, while the sum is 23.

The square root of 221434007 is about 14880.6588227807. The cubic root of 221434007 is about 604.9898748391.

Adding to 221434007 its reverse (700434122), we get a palindrome (921868129).

The spelling of 221434007 in words is "two hundred twenty-one million, four hundred thirty-four thousand, seven".