65545240 has 32 divisors (see below), whose sum is σ = 149503680. Its totient is φ = 25857792.

The previous prime is 65545237. The next prime is 65545243. The reversal of 65545240 is 4254556.

It is an interprime number because it is at equal distance from previous prime (65545237) and next prime (65545243).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65545243) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8304 + ... + 14143.

It is an arithmetic number, because the mean of its divisors is an integer number (4671990).

Almost surely, 2^65545240 is an apocalyptic number.

It is an amenable number.

65545240 is an abundant number, since it is smaller than the sum of its proper divisors (83958440).

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

65545240 is a wasteful number, since it uses less digits than its factorization.

65545240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22531 (or 22527 counting only the distinct ones).

The product of its (nonzero) digits is 24000, while the sum is 31.

The square root of 65545240 is about 8096.0014822133. The cubic root of 65545240 is about 403.1936831073.

Adding to 65545240 its reverse (4254556), we get a palindrome (69799796).

The spelling of 65545240 in words is "sixty-five million, five hundred forty-five thousand, two hundred forty".