65140431 has 12 divisors (see below), whose sum is σ = 89030856. Its totient is φ = 42364480.

The previous prime is 65140403. The next prime is 65140433. The reversal of 65140431 is 13404156.

It is not a de Polignac number, because 65140431 - 2⁶ = 65140367 is a prime.

It is a super-2 number, since 2×65140431² = 8486551501731522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65140433) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1416 + ... + 11501.

It is an arithmetic number, because the mean of its divisors is an integer number (7419238).

Almost surely, 2^65140431 is an apocalyptic number.

65140431 is a deficient number, since it is larger than the sum of its proper divisors (23890425).

65140431 is a wasteful number, since it uses less digits than its factorization.

65140431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13002 (or 12961 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 65140431 is about 8070.9622102944. The cubic root of 65140431 is about 402.3619237562.

Adding to 65140431 its reverse (13404156), we get a palindrome (78544587).

The spelling of 65140431 in words is "sixty-five million, one hundred forty thousand, four hundred thirty-one".