65330531 has 24 divisors (see below), whose sum is σ = 79881984. Its totient is φ = 52326000.

The previous prime is 65330527. The next prime is 65330581. The reversal of 65330531 is 13503356.

It is not a de Polignac number, because 65330531 - 2² = 65330527 is a prime.

It is a super-3 number, since 3×65330531³ (a number of 24 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a self number, because there is not a number n which added to its sum of digits gives 65330531.

It is not an unprimeable number, because it can be changed into a prime (65330501) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 260156 + ... + 260406.

It is an arithmetic number, because the mean of its divisors is an integer number (3328416).

Almost surely, 2^65330531 is an apocalyptic number.

65330531 is a deficient number, since it is larger than the sum of its proper divisors (14551453).

65330531 is a wasteful number, since it uses less digits than its factorization.

65330531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 399 (or 380 counting only the distinct ones).

The product of its (nonzero) digits is 4050, while the sum is 26.

The square root of 65330531 is about 8082.7304173775. The cubic root of 65330531 is about 402.7529492924.

Adding to 65330531 its reverse (13503356), we get a palindrome (78833887).

The spelling of 65330531 in words is "sixty-five million, three hundred thirty thousand, five hundred thirty-one".