65040331 has 4 divisors (see below), whose sum is σ = 65956464. Its totient is φ = 64124200.

The previous prime is 65040329. The next prime is 65040337. The reversal of 65040331 is 13304056.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 65040331 - 2¹ = 65040329 is a prime.

It is a super-2 number, since 2×65040331² = 8460489313179122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65040337) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 457960 + ... + 458101.

It is an arithmetic number, because the mean of its divisors is an integer number (16489116).

Almost surely, 2^65040331 is an apocalyptic number.

65040331 is a deficient number, since it is larger than the sum of its proper divisors (916133).

65040331 is an equidigital number, since it uses as much as digits as its factorization.

65040331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 916132.

The product of its (nonzero) digits is 1080, while the sum is 22.

The square root of 65040331 is about 8064.7585828715. The cubic root of 65040331 is about 402.1557175837.

Adding to 65040331 its reverse (13304056), we get a palindrome (78344387).

The spelling of 65040331 in words is "sixty-five million, forty thousand, three hundred thirty-one".