65105501 has 2 divisors, whose sum is σ = 65105502. Its totient is φ = 65105500.

The previous prime is 65105473. The next prime is 65105503. The reversal of 65105501 is 10550156.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 32604100 + 32501401 = 5710^2 + 5701^2 .

It is a cyclic number.

It is not a de Polignac number, because 65105501 - 2¹⁰ = 65104477 is a prime.

It is a super-2 number, since 2×65105501² = 8477452520922002, which contains 22 as substring.

Together with 65105503, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65105503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32552750 + 32552751.

It is an arithmetic number, because the mean of its divisors is an integer number (32552751).

Almost surely, 2^65105501 is an apocalyptic number.

It is an amenable number.

65105501 is a deficient number, since it is larger than the sum of its proper divisors (1).

65105501 is an equidigital number, since it uses as much as digits as its factorization.

65105501 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 750, while the sum is 23.

The square root of 65105501 is about 8068.7979897876. The cubic root of 65105501 is about 402.2899919075.

Adding to 65105501 its reverse (10550156), we get a palindrome (75655657).

The spelling of 65105501 in words is "sixty-five million, one hundred five thousand, five hundred one".