4224172261 has 2 divisors, whose sum is σ = 4224172262. Its totient is φ = 4224172260.

The previous prime is 4224172259. The next prime is 4224172363. The reversal of 4224172261 is 1622714224.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4082443236 + 141729025 = 63894^2 + 11905^2 .

It is a cyclic number.

It is not a de Polignac number, because 4224172261 - 2¹ = 4224172259 is a prime.

Together with 4224172259, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4224172241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2112086130 + 2112086131.

It is an arithmetic number, because the mean of its divisors is an integer number (2112086131).

Almost surely, 2^4224172261 is an apocalyptic number.

It is an amenable number.

4224172261 is a deficient number, since it is larger than the sum of its proper divisors (1).

4224172261 is an equidigital number, since it uses as much as digits as its factorization.

4224172261 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10752, while the sum is 31.

The square root of 4224172261 is about 64993.6324650346. The cubic root of 4224172261 is about 1616.5179823203.

Adding to 4224172261 its reverse (1622714224), we get a palindrome (5846886485).

The spelling of 4224172261 in words is "four billion, two hundred twenty-four million, one hundred seventy-two thousand, two hundred sixty-one".