65494221 has 16 divisors (see below), whose sum is σ = 95180736. Its totient is φ = 39816576.

The previous prime is 65494211. The next prime is 65494223. The reversal of 65494221 is 12249456.

It is not a de Polignac number, because 65494221 - 2¹⁴ = 65477837 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65494223) 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 15 ways as a sum of consecutive naturals, for example, 6880 + ... + 13353.

It is an arithmetic number, because the mean of its divisors is an integer number (5948796).

Almost surely, 2^65494221 is an apocalyptic number.

It is an amenable number.

65494221 is a deficient number, since it is larger than the sum of its proper divisors (29686515).

65494221 is a wasteful number, since it uses less digits than its factorization.

65494221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20332.

The product of its digits is 17280, while the sum is 33.

The square root of 65494221 is about 8092.8499924316. The cubic root of 65494221 is about 403.0890435330.

The spelling of 65494221 in words is "sixty-five million, four hundred ninety-four thousand, two hundred twenty-one".