4255140221 has 2 divisors, whose sum is σ = 4255140222. Its totient is φ = 4255140220.

The previous prime is 4255140191. The next prime is 4255140229. The reversal of 4255140221 is 1220415524.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4129476121 + 125664100 = 64261^2 + 11210^2 .

It is a cyclic number.

It is not a de Polignac number, because 4255140221 - 2⁶ = 4255140157 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4255140229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2127570110 + 2127570111.

It is an arithmetic number, because the mean of its divisors is an integer number (2127570111).

Almost surely, 2^4255140221 is an apocalyptic number.

It is an amenable number.

4255140221 is a deficient number, since it is larger than the sum of its proper divisors (1).

4255140221 is an equidigital number, since it uses as much as digits as its factorization.

4255140221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3200, while the sum is 26.

The square root of 4255140221 is about 65231.4358342663. The cubic root of 4255140221 is about 1620.4586697235.

Adding to 4255140221 its reverse (1220415524), we get a palindrome (5475555745).

The spelling of 4255140221 in words is "four billion, two hundred fifty-five million, one hundred forty thousand, two hundred twenty-one".