65530100 has 18 divisors (see below), whose sum is σ = 142200534. Its totient is φ = 26212000.

The previous prime is 65530099. The next prime is 65530109. The reversal of 65530100 is 103556.

It can be written as a sum of positive squares in 3 ways, for example, as 14092516 + 51437584 = 3754^2 + 7172^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65530109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 327551 + ... + 327750.

Almost surely, 2^65530100 is an apocalyptic number.

It is an amenable number.

65530100 is an abundant number, since it is smaller than the sum of its proper divisors (76670434).

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

65530100 is a wasteful number, since it uses less digits than its factorization.

65530100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 655315 (or 655308 counting only the distinct ones).

The product of its (nonzero) digits is 450, while the sum is 20.

The square root of 65530100 is about 8095.0663987394. The cubic root of 65530100 is about 403.1626367520.

Adding to 65530100 its reverse (103556), we get a palindrome (65633656).

The spelling of 65530100 in words is "sixty-five million, five hundred thirty thousand, one hundred".