65503130 has 64 divisors (see below), whose sum is σ = 148684032. Its totient is φ = 20183040.

The previous prime is 65503129. The next prime is 65503133. The reversal of 65503130 is 3130556.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 65503096 and 65503105.

It is not an unprimeable number, because it can be changed into a prime (65503133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 74252 + ... + 75128.

It is an arithmetic number, because the mean of its divisors is an integer number (2323188).

Almost surely, 2^65503130 is an apocalyptic number.

65503130 is an abundant number, since it is smaller than the sum of its proper divisors (83180902).

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

65503130 is a wasteful number, since it uses less digits than its factorization.

65503130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 999.

The product of its (nonzero) digits is 1350, while the sum is 23.

The square root of 65503130 is about 8093.4003978550. The cubic root of 65503130 is about 403.1073197382.

Adding to 65503130 its reverse (3130556), we get a palindrome (68633686).

The spelling of 65503130 in words is "sixty-five million, five hundred three thousand, one hundred thirty".