65140531 has 12 divisors (see below), whose sum is σ = 71690920. Its totient is φ = 59019840.

The previous prime is 65140529. The next prime is 65140561. The reversal of 65140531 is 13504156.

It is not a de Polignac number, because 65140531 - 2¹ = 65140529 is a prime.

It is a super-2 number, since 2×65140531² = 8486577557923922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 65140496 and 65140505.

It is not an unprimeable number, because it can be changed into a prime (65140511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6811 + ... + 13291.

Almost surely, 2^65140531 is an apocalyptic number.

65140531 is a deficient number, since it is larger than the sum of its proper divisors (6550389).

65140531 is a wasteful number, since it uses less digits than its factorization.

65140531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6546 (or 6523 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 25.

The square root of 65140531 is about 8070.9684053402. The cubic root of 65140531 is about 402.3621296507.

Adding to 65140531 its reverse (13504156), we get a palindrome (78644687).

The spelling of 65140531 in words is "sixty-five million, one hundred forty thousand, five hundred thirty-one".