65105812 has 24 divisors (see below), whose sum is σ = 119052360. Its totient is φ = 31113600.

The previous prime is 65105791. The next prime is 65105813. The reversal of 65105812 is 21850156.

It can be written as a sum of positive squares in 4 ways, for example, as 44275716 + 20830096 = 6654^2 + 4564^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65105813) 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, 8938 + ... + 14494.

It is an arithmetic number, because the mean of its divisors is an integer number (4960515).

Almost surely, 2^65105812 is an apocalyptic number.

It is an amenable number.

65105812 is a deficient number, since it is larger than the sum of its proper divisors (53946548).

65105812 is a wasteful number, since it uses less digits than its factorization.

65105812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5691 (or 5689 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 28.

The square root of 65105812 is about 8068.8172615322. The cubic root of 65105812 is about 402.2906324678.

Adding to 65105812 its reverse (21850156), we get a palindrome (86955968).

The spelling of 65105812 in words is "sixty-five million, one hundred five thousand, eight hundred twelve".