65615201 has 2 divisors, whose sum is σ = 65615202. Its totient is φ = 65615200.

The previous prime is 65615183. The next prime is 65615203. The reversal of 65615201 is 10251656.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 57775201 + 7840000 = 7601^2 + 2800^2 .

It is a cyclic number.

It is not a de Polignac number, because 65615201 - 2¹⁰ = 65614177 is a prime.

It is a super-5 number, since 5×65615201⁵ (a number of 40 digits) contains 55555 as substring.

Together with 65615203, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (65615203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32807600 + 32807601.

It is an arithmetic number, because the mean of its divisors is an integer number (32807601).

Almost surely, 2^65615201 is an apocalyptic number.

It is an amenable number.

65615201 is a deficient number, since it is larger than the sum of its proper divisors (1).

65615201 is an equidigital number, since it uses as much as digits as its factorization.

65615201 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1800, while the sum is 26.

The square root of 65615201 is about 8100.3210430205. The cubic root of 65615201 is about 403.3370843325.

Adding to 65615201 its reverse (10251656), we get a palindrome (75866857).

The spelling of 65615201 in words is "sixty-five million, six hundred fifteen thousand, two hundred one".