63128231 has 2 divisors, whose sum is σ = 63128232. Its totient is φ = 63128230.

The previous prime is 63128213. The next prime is 63128237. The reversal of 63128231 is 13282136.

63128231 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

Together with previous prime (63128213) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 63128231 - 2¹⁸ = 62866087 is a prime.

It is a super-2 number, since 2×63128231² = 7970347098378722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 63128231.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (63128237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31564115 + 31564116.

It is an arithmetic number, because the mean of its divisors is an integer number (31564116).

Almost surely, 2^63128231 is an apocalyptic number.

63128231 is a deficient number, since it is larger than the sum of its proper divisors (1).

63128231 is an equidigital number, since it uses as much as digits as its factorization.

63128231 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1728, while the sum is 26.

The square root of 63128231 is about 7945.3276206837. The cubic root of 63128231 is about 398.1755052837.

The spelling of 63128231 in words is "sixty-three million, one hundred twenty-eight thousand, two hundred thirty-one".