65023530 has 128 divisors (see below), whose sum is σ = 191600640. Its totient is φ = 13896960.

The previous prime is 65023501. The next prime is 65023537. The reversal of 65023530 is 3532056.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 65023530.

It is not an unprimeable number, because it can be changed into a prime (65023537) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 98341 + ... + 98999.

It is an arithmetic number, because the mean of its divisors is an integer number (1496880).

Almost surely, 2^65023530 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 65023530, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (95800320).

65023530 is an abundant number, since it is smaller than the sum of its proper divisors (126577110).

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

65023530 is a wasteful number, since it uses less digits than its factorization.

65023530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 716.

The product of its (nonzero) digits is 2700, while the sum is 24.

The square root of 65023530 is about 8063.7168849111. The cubic root of 65023530 is about 402.1210867632.

Adding to 65023530 its reverse (3532056), we get a palindrome (68555586).

The spelling of 65023530 in words is "sixty-five million, twenty-three thousand, five hundred thirty".