65631267131 has 4 divisors (see below), whose sum is σ = 65633504952. Its totient is φ = 65629029312.

The previous prime is 65631267127. The next prime is 65631267139. The reversal of 65631267131 is 13176213656.

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 65631267131 - 2² = 65631267127 is a prime.

It is a super-2 number, since 2×65631267131² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65631267139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1074326 + ... + 1133771.

It is an arithmetic number, because the mean of its divisors is an integer number (16408376238).

Almost surely, 2^65631267131 is an apocalyptic number.

65631267131 is a deficient number, since it is larger than the sum of its proper divisors (2237821).

65631267131 is a wasteful number, since it uses less digits than its factorization.

65631267131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2237820.

The product of its digits is 136080, while the sum is 41.

The spelling of 65631267131 in words is "sixty-five billion, six hundred thirty-one million, two hundred sixty-seven thousand, one hundred thirty-one".