128211527 has 2 divisors, whose sum is σ = 128211528. Its totient is φ = 128211526.

The previous prime is 128211497. The next prime is 128211529. The reversal of 128211527 is 725112821.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 128211527 - 2⁶ = 128211463 is a prime.

Together with 128211529, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 128211527.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (128211529) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64105763 + 64105764.

It is an arithmetic number, because the mean of its divisors is an integer number (64105764).

Almost surely, 2^128211527 is an apocalyptic number.

128211527 is a deficient number, since it is larger than the sum of its proper divisors (1).

128211527 is an equidigital number, since it uses as much as digits as its factorization.

128211527 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2240, while the sum is 29.

The square root of 128211527 is about 11323.0529010510. The cubic root of 128211527 is about 504.2458789669.

The spelling of 128211527 in words is "one hundred twenty-eight million, two hundred eleven thousand, five hundred twenty-seven".