65128227 has 4 divisors (see below), whose sum is σ = 86837640. Its totient is φ = 43418816.

The previous prime is 65128223. The next prime is 65128253. The reversal of 65128227 is 72282156.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 65128227 - 2² = 65128223 is a prime.

It is not an unprimeable number, because it can be changed into a prime (65128223) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10854702 + ... + 10854707.

It is an arithmetic number, because the mean of its divisors is an integer number (21709410).

Almost surely, 2^65128227 is an apocalyptic number.

65128227 is a deficient number, since it is larger than the sum of its proper divisors (21709413).

65128227 is a wasteful number, since it uses less digits than its factorization.

65128227 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21709412.

The product of its digits is 13440, while the sum is 33.

The square root of 65128227 is about 8070.2061311964. The cubic root of 65128227 is about 402.3367948077.

The spelling of 65128227 in words is "sixty-five million, one hundred twenty-eight thousand, two hundred twenty-seven".