65072331 has 12 divisors (see below), whose sum is σ = 94103152. Its totient is φ = 43330896.

The previous prime is 65072327. The next prime is 65072333. The reversal of 65072331 is 13327056.

It is a happy number.

65072331 is a `hidden beast` number, since 650 + 7 + 2 + 3 + 3 + 1 = 666.

It is not a de Polignac number, because 65072331 - 2² = 65072327 is a prime.

It is a super-2 number, since 2×65072331² = 8468816523547122, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 65072295 and 65072304.

It is not an unprimeable number, because it can be changed into a prime (65072333) 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, 4965 + ... + 12441.

Almost surely, 2^65072331 is an apocalyptic number.

65072331 is a deficient number, since it is larger than the sum of its proper divisors (29030821).

65072331 is a wasteful number, since it uses less digits than its factorization.

65072331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8450 (or 8447 counting only the distinct ones).

The product of its (nonzero) digits is 3780, while the sum is 27.

The square root of 65072331 is about 8066.7422792599. The cubic root of 65072331 is about 402.2216606317.

Adding to 65072331 its reverse (13327056), we get a palindrome (78399387).

The spelling of 65072331 in words is "sixty-five million, seventy-two thousand, three hundred thirty-one".