4200507221 has 2 divisors, whose sum is σ = 4200507222. Its totient is φ = 4200507220.

The previous prime is 4200507197. The next prime is 4200507247. The reversal of 4200507221 is 1227050024.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4055906596 + 144600625 = 63686^2 + 12025^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4200507221 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4200507121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2100253610 + 2100253611.

It is an arithmetic number, because the mean of its divisors is an integer number (2100253611).

Almost surely, 2^4200507221 is an apocalyptic number.

It is an amenable number.

4200507221 is a deficient number, since it is larger than the sum of its proper divisors (1).

4200507221 is an equidigital number, since it uses as much as digits as its factorization.

4200507221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1120, while the sum is 23.

The square root of 4200507221 is about 64811.3201609102. The cubic root of 4200507221 is about 1613.4935930047.

Adding to 4200507221 its reverse (1227050024), we get a palindrome (5427557245).

The spelling of 4200507221 in words is "four billion, two hundred million, five hundred seven thousand, two hundred twenty-one".