65316520 has 16 divisors (see below), whose sum is σ = 146962260. Its totient is φ = 26126592.

The previous prime is 65316487. The next prime is 65316529. The reversal of 65316520 is 2561356.

65316520 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 64288324 + 1028196 = 8018^2 + 1014^2 .

It is not an unprimeable number, because it can be changed into a prime (65316529) 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, 816417 + ... + 816496.

Almost surely, 2^65316520 is an apocalyptic number.

It is an amenable number.

65316520 is an abundant number, since it is smaller than the sum of its proper divisors (81645740).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

65316520 is a wasteful number, since it uses less digits than its factorization.

65316520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1632924 (or 1632920 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 28.

The square root of 65316520 is about 8081.8636464617. The cubic root of 65316520 is about 402.7241553277.

Adding to 65316520 its reverse (2561356), we get a palindrome (67877876).

The spelling of 65316520 in words is "sixty-five million, three hundred sixteen thousand, five hundred twenty".