65464221 has 8 divisors (see below), whose sum is σ = 87335424. Its totient is φ = 43617920.

The previous prime is 65464207. The next prime is 65464247. The reversal of 65464221 is 12246456.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 65464221 - 2¹⁰ = 65463197 is a prime.

It is a super-2 number, since 2×65464221² = 8571128462273682, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65464271) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1165 + ... + 11501.

It is an arithmetic number, because the mean of its divisors is an integer number (10916928).

Almost surely, 2^65464221 is an apocalyptic number.

It is an amenable number.

65464221 is a deficient number, since it is larger than the sum of its proper divisors (21871203).

65464221 is a wasteful number, since it uses less digits than its factorization.

65464221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12451.

The product of its digits is 11520, while the sum is 30.

The square root of 65464221 is about 8090.9962921756. The cubic root of 65464221 is about 403.0274883913.

The spelling of 65464221 in words is "sixty-five million, four hundred sixty-four thousand, two hundred twenty-one".