65518225 has 12 divisors (see below), whose sum is σ = 81356400. Its totient is φ = 52341200.

The previous prime is 65518223. The next prime is 65518247. The reversal of 65518225 is 52281556.

It is not a de Polignac number, because 65518225 - 2¹ = 65518223 is a prime.

It is not an unprimeable number, because it can be changed into a prime (65518223) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 22926 + ... + 25624.

It is an arithmetic number, because the mean of its divisors is an integer number (6779700).

Almost surely, 2^65518225 is an apocalyptic number.

It is an amenable number.

65518225 is a deficient number, since it is larger than the sum of its proper divisors (15838175).

65518225 is a wasteful number, since it uses less digits than its factorization.

65518225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3680 (or 3675 counting only the distinct ones).

The product of its digits is 24000, while the sum is 34.

The square root of 65518225 is about 8094.3328940685. The cubic root of 65518225 is about 403.1382823178.

The spelling of 65518225 in words is "sixty-five million, five hundred eighteen thousand, two hundred twenty-five".