128215433 has 2 divisors, whose sum is σ = 128215434. Its totient is φ = 128215432.

The previous prime is 128215429. The next prime is 128215441. The reversal of 128215433 is 334512821.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 127870864 + 344569 = 11308^2 + 587^2 .

It is a cyclic number.

It is not a de Polignac number, because 128215433 - 2² = 128215429 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 128215396 and 128215405.

It is not a weakly prime, because it can be changed into another prime (128215403) 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, 64107716 + 64107717.

It is an arithmetic number, because the mean of its divisors is an integer number (64107717).

Almost surely, 2^128215433 is an apocalyptic number.

It is an amenable number.

128215433 is a deficient number, since it is larger than the sum of its proper divisors (1).

128215433 is an equidigital number, since it uses as much as digits as its factorization.

128215433 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5760, while the sum is 29.

The square root of 128215433 is about 11323.2253797229. The cubic root of 128215433 is about 504.2509995788.

The spelling of 128215433 in words is "one hundred twenty-eight million, two hundred fifteen thousand, four hundred thirty-three".