65343531 has 16 divisors (see below), whose sum is σ = 97257600. Its totient is φ = 38680320.

The previous prime is 65343511. The next prime is 65343571. The reversal of 65343531 is 13534356.

It is a happy number.

It is not a de Polignac number, because 65343531 - 2⁷ = 65343403 is a prime.

It is a super-2 number, since 2×65343531² = 8539554087095922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (65343511) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21606 + ... + 24443.

It is an arithmetic number, because the mean of its divisors is an integer number (6078600).

Almost surely, 2^65343531 is an apocalyptic number.

65343531 is a deficient number, since it is larger than the sum of its proper divisors (31914069).

65343531 is a wasteful number, since it uses less digits than its factorization.

65343531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46106.

The product of its digits is 16200, while the sum is 30.

The square root of 65343531 is about 8083.5345610692. The cubic root of 65343531 is about 402.7796618724.

Adding to 65343531 its reverse (13534356), we get a palindrome (78877887).

The spelling of 65343531 in words is "sixty-five million, three hundred forty-three thousand, five hundred thirty-one".