65243011 has 4 divisors (see below), whose sum is σ = 67492800. Its totient is φ = 62993224.

The previous prime is 65242999. The next prime is 65243021. The reversal of 65243011 is 11034256.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 65243011 - 2⁷ = 65242883 is a prime.

It is a super-2 number, since 2×65243011² = 8513300968692242, which contains 22 as substring.

It is a Duffinian number.

It is a zygodrome in base 2.

It is not an unprimeable number, because it can be changed into a prime (65243021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1124851 + ... + 1124908.

It is an arithmetic number, because the mean of its divisors is an integer number (16873200).

Almost surely, 2^65243011 is an apocalyptic number.

65243011 is a deficient number, since it is larger than the sum of its proper divisors (2249789).

65243011 is a wasteful number, since it uses less digits than its factorization.

65243011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2249788.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 65243011 is about 8077.3145908773. The cubic root of 65243011 is about 402.5730196857.

Adding to 65243011 its reverse (11034256), we get a palindrome (76277267).

The spelling of 65243011 in words is "sixty-five million, two hundred forty-three thousand, eleven".