65452181 has 16 divisors (see below), whose sum is σ = 70156800. Its totient is φ = 60926448.

The previous prime is 65452157. The next prime is 65452183. The reversal of 65452181 is 18125456.

It is not a de Polignac number, because 65452181 - 2¹⁰ = 65451157 is a prime.

It is a super-2 number, since 2×65452181² = 8567975995313522, which contains 22 as substring.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65452183) 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, 188450 + ... + 188796.

It is an arithmetic number, because the mean of its divisors is an integer number (4384800).

Almost surely, 2^65452181 is an apocalyptic number.

It is an amenable number.

65452181 is a deficient number, since it is larger than the sum of its proper divisors (4704619).

65452181 is a wasteful number, since it uses less digits than its factorization.

65452181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 568.

The product of its digits is 9600, while the sum is 32.

The square root of 65452181 is about 8090.2522210374. The cubic root of 65452181 is about 403.0027789730.

The spelling of 65452181 in words is "sixty-five million, four hundred fifty-two thousand, one hundred eighty-one".