65631076213 has 4 divisors (see below), whose sum is σ = 65633244940. Its totient is φ = 65628907488.

The previous prime is 65631076177. The next prime is 65631076241. The reversal of 65631076213 is 31267013656.

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 5440832644 + 60190243569 = 73762^2 + 245337^2 .

It is a cyclic number.

It is not a de Polignac number, because 65631076213 - 2⁹ = 65631075701 is a prime.

It is a super-2 number, since 2×65631076213² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65631076513) 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, 1038318 + ... + 1099711.

It is an arithmetic number, because the mean of its divisors is an integer number (16408311235).

Almost surely, 2^65631076213 is an apocalyptic number.

It is an amenable number.

65631076213 is a deficient number, since it is larger than the sum of its proper divisors (2168727).

65631076213 is a wasteful number, since it uses less digits than its factorization.

65631076213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2168726.

The product of its (nonzero) digits is 136080, while the sum is 40.

Adding to 65631076213 its reverse (31267013656), we get a palindrome (96898089869).

The spelling of 65631076213 in words is "sixty-five billion, six hundred thirty-one million, seventy-six thousand, two hundred thirteen".