65382381 has 12 divisors (see below), whose sum is σ = 94725852. Its totient is φ = 43456896.

The previous prime is 65382347. The next prime is 65382407. The reversal of 65382381 is 18328356.

It can be written as a sum of positive squares in 2 ways, for example, as 11492100 + 53890281 = 3390^2 + 7341^2 .

It is not a de Polignac number, because 65382381 - 2⁷ = 65382253 is a prime.

It is a super-2 number, since 2×65382381² = 8549711490458322, which contains 22 as substring.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65382181) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7746 + ... + 13811.

It is an arithmetic number, because the mean of its divisors is an integer number (7893821).

Almost surely, 2^65382381 is an apocalyptic number.

It is an amenable number.

65382381 is a deficient number, since it is larger than the sum of its proper divisors (29343471).

65382381 is a wasteful number, since it uses less digits than its factorization.

65382381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21900 (or 21897 counting only the distinct ones).

The product of its digits is 34560, while the sum is 36.

The square root of 65382381 is about 8085.9372369565. The cubic root of 65382381 is about 402.8594702812.

The spelling of 65382381 in words is "sixty-five million, three hundred eighty-two thousand, three hundred eighty-one".