5127432221 has 2 divisors, whose sum is σ = 5127432222. Its totient is φ = 5127432220.

The previous prime is 5127432179. The next prime is 5127432227. The reversal of 5127432221 is 1222347215.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4778265625 + 349166596 = 69125^2 + 18686^2 .

It is a cyclic number.

It is not a de Polignac number, because 5127432221 - 2¹⁴ = 5127415837 is a prime.

It is a super-2 number, since 2×5127432221² = 52581122361897985682, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5127432227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2563716110 + 2563716111.

It is an arithmetic number, because the mean of its divisors is an integer number (2563716111).

Almost surely, 2^5127432221 is an apocalyptic number.

It is an amenable number.

5127432221 is a deficient number, since it is larger than the sum of its proper divisors (1).

5127432221 is an equidigital number, since it uses as much as digits as its factorization.

5127432221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6720, while the sum is 29.

The square root of 5127432221 is about 71606.0906697189. The cubic root of 5127432221 is about 1724.3813193782.

Adding to 5127432221 its reverse (1222347215), we get a palindrome (6349779436).

The spelling of 5127432221 in words is "five billion, one hundred twenty-seven million, four hundred thirty-two thousand, two hundred twenty-one".