65227209 has 16 divisors (see below), whose sum is σ = 91718400. Its totient is φ = 41119056.

The previous prime is 65227199. The next prime is 65227213. The reversal of 65227209 is 90272256.

It is a happy number.

It is not a de Polignac number, because 65227209 - 2¹¹ = 65225161 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 65227209.

It is not an unprimeable number, because it can be changed into a prime (65227229) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 57522 + ... + 58644.

It is an arithmetic number, because the mean of its divisors is an integer number (5732400).

Almost surely, 2^65227209 is an apocalyptic number.

It is an amenable number.

65227209 is a deficient number, since it is larger than the sum of its proper divisors (26491191).

65227209 is a wasteful number, since it uses less digits than its factorization.

65227209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2164.

The product of its (nonzero) digits is 15120, while the sum is 33.

The square root of 65227209 is about 8076.3363600088. The cubic root of 65227209 is about 402.5405157060.

It can be divided in two parts, 6522 and 7209, that added together give a palindrome (13731).

The spelling of 65227209 in words is "sixty-five million, two hundred twenty-seven thousand, two hundred nine".