65430531 has 8 divisors (see below), whose sum is σ = 96934160. Its totient is φ = 43620336.

The previous prime is 65430517. The next prime is 65430539. The reversal of 65430531 is 13503456.

65430531 is a `hidden beast` number, since 654 + 3 + 0 + 5 + 3 + 1 = 666.

It is not a de Polignac number, because 65430531 - 2⁷ = 65430403 is a prime.

It is a super-2 number, since 2×65430531² = 8562308773883922, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 2423353 = 65430531 / (6 + 5 + 4 + 3 + 0 + 5 + 3 + 1).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 65430495 and 65430504.

It is not an unprimeable number, because it can be changed into a prime (65430539) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1211650 + ... + 1211703.

It is an arithmetic number, because the mean of its divisors is an integer number (12116770).

Almost surely, 2^65430531 is an apocalyptic number.

65430531 is a deficient number, since it is larger than the sum of its proper divisors (31503629).

65430531 is a wasteful number, since it uses less digits than its factorization.

65430531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2423362 (or 2423356 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 27.

The square root of 65430531 is about 8088.9140803942. The cubic root of 65430531 is about 402.9583395455.

Adding to 65430531 its reverse (13503456), we get a palindrome (78933987).

The spelling of 65430531 in words is "sixty-five million, four hundred thirty thousand, five hundred thirty-one".