128752231 has 2 divisors, whose sum is σ = 128752232. Its totient is φ = 128752230.

The previous prime is 128752201. The next prime is 128752243. The reversal of 128752231 is 132257821.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 128752231 - 2⁷ = 128752103 is a prime.

It is a super-2 number, since 2×128752231² = 33154273974954722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 128752193 and 128752202.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (128752201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64376115 + 64376116.

It is an arithmetic number, because the mean of its divisors is an integer number (64376116).

Almost surely, 2^128752231 is an apocalyptic number.

128752231 is a deficient number, since it is larger than the sum of its proper divisors (1).

128752231 is an equidigital number, since it uses as much as digits as its factorization.

128752231 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6720, while the sum is 31.

The square root of 128752231 is about 11346.9040270904. The cubic root of 128752231 is about 504.9537336302.

The spelling of 128752231 in words is "one hundred twenty-eight million, seven hundred fifty-two thousand, two hundred thirty-one".