65280331 has 4 divisors (see below), whose sum is σ = 65540664. Its totient is φ = 65020000.

The previous prime is 65280329. The next prime is 65280361. The reversal of 65280331 is 13308256.

65280331 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 65280331 - 2¹ = 65280329 is a prime.

It is a super-2 number, since 2×65280331² = 8523043230939122, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 65280331.

It is not an unprimeable number, because it can be changed into a prime (65280361) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 129790 + ... + 130291.

It is an arithmetic number, because the mean of its divisors is an integer number (16385166).

Almost surely, 2^65280331 is an apocalyptic number.

65280331 is a deficient number, since it is larger than the sum of its proper divisors (260333).

65280331 is a wasteful number, since it uses less digits than its factorization.

65280331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 260332.

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 65280331 is about 8079.6244343410. The cubic root of 65280331 is about 402.6497643623.

Adding to 65280331 its reverse (13308256), we get a palindrome (78588587).

The spelling of 65280331 in words is "sixty-five million, two hundred eighty thousand, three hundred thirty-one".