65642236231 has 32 divisors (see below), whose sum is σ = 78345449280. Its totient is φ = 54536976000.

The previous prime is 65642236217. The next prime is 65642236301. The reversal of 65642236231 is 13263224656.

It is not a de Polignac number, because 65642236231 - 2²³ = 65633847623 is a prime.

It is a super-2 number, since 2×65642236231² (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 (65642236211) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2427421 + ... + 2454313.

It is an arithmetic number, because the mean of its divisors is an integer number (2448295290).

Almost surely, 2^65642236231 is an apocalyptic number.

65642236231 is a deficient number, since it is larger than the sum of its proper divisors (12703213049).

65642236231 is a wasteful number, since it uses less digits than its factorization.

65642236231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27044 (or 27018 counting only the distinct ones).

The product of its digits is 311040, while the sum is 40.

The spelling of 65642236231 in words is "sixty-five billion, six hundred forty-two million, two hundred thirty-six thousand, two hundred thirty-one".