65011213 has 4 divisors (see below), whose sum is σ = 68835420. Its totient is φ = 61187008.

The previous prime is 65011201. The next prime is 65011223. The reversal of 65011213 is 31211056.

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

It can be written as a sum of positive squares in 2 ways, for example, as 38663524 + 26347689 = 6218^2 + 5133^2 .

It is a cyclic number.

It is not a de Polignac number, because 65011213 - 2¹⁷ = 64880141 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65011223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1912078 + ... + 1912111.

It is an arithmetic number, because the mean of its divisors is an integer number (17208855).

Almost surely, 2^65011213 is an apocalyptic number.

It is an amenable number.

65011213 is a deficient number, since it is larger than the sum of its proper divisors (3824207).

65011213 is a wasteful number, since it uses less digits than its factorization.

65011213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3824206.

The product of its (nonzero) digits is 180, while the sum is 19.

The square root of 65011213 is about 8062.9531190501. The cubic root of 65011213 is about 402.0956947336.

Adding to 65011213 its reverse (31211056), we get a palindrome (96222269).

The spelling of 65011213 in words is "sixty-five million, eleven thousand, two hundred thirteen".