128532311 has 2 divisors, whose sum is σ = 128532312. Its totient is φ = 128532310.

The previous prime is 128532281. The next prime is 128532407. The reversal of 128532311 is 113235821.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-128532311 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (128562311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64266155 + 64266156.

It is an arithmetic number, because the mean of its divisors is an integer number (64266156).

Almost surely, 2^128532311 is an apocalyptic number.

128532311 is a deficient number, since it is larger than the sum of its proper divisors (1).

128532311 is an equidigital number, since it uses as much as digits as its factorization.

128532311 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1440, while the sum is 26.

The square root of 128532311 is about 11337.2091362910. The cubic root of 128532311 is about 504.6660681618. Note that the first 3 decimals are identical.

The spelling of 128532311 in words is "one hundred twenty-eight million, five hundred thirty-two thousand, three hundred eleven".