65218427 has 4 divisors (see below), whose sum is σ = 65864256. Its totient is φ = 64572600.

The previous prime is 65218421. The next prime is 65218441. The reversal of 65218427 is 72481256.

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 65218427 - 2¹⁰ = 65217403 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65218421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 322763 + ... + 322964.

It is an arithmetic number, because the mean of its divisors is an integer number (16466064).

Almost surely, 2^65218427 is an apocalyptic number.

65218427 is a deficient number, since it is larger than the sum of its proper divisors (645829).

65218427 is a wasteful number, since it uses less digits than its factorization.

65218427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 645828.

The product of its digits is 26880, while the sum is 35.

The square root of 65218427 is about 8075.7926545943. The cubic root of 65218427 is about 402.5224492706.

The spelling of 65218427 in words is "sixty-five million, two hundred eighteen thousand, four hundred twenty-seven".