65415500 has 48 divisors (see below), whose sum is σ = 146397888. Its totient is φ = 25520000.

The previous prime is 65415481. The next prime is 65415509. The reversal of 65415500 is 551456.

65415500 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a hoax number, since the sum of its digits (26) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 65415500.

It is not an unprimeable number, because it can be changed into a prime (65415509) 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 15 ways as a sum of consecutive naturals, for example, 18905 + ... + 22095.

It is an arithmetic number, because the mean of its divisors is an integer number (3049956).

Almost surely, 2^65415500 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 65415500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (73198944).

65415500 is an abundant number, since it is smaller than the sum of its proper divisors (80982388).

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

65415500 is a wasteful number, since it uses less digits than its factorization.

65415500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3251 (or 3239 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 26.

The square root of 65415500 is about 8087.9849159108. The cubic root of 65415500 is about 402.9274807065.

Adding to 65415500 its reverse (551456), we get a palindrome (65966956).

The spelling of 65415500 in words is "sixty-five million, four hundred fifteen thousand, five hundred".