65242531 has 2 divisors, whose sum is σ = 65242532. Its totient is φ = 65242530.

The previous prime is 65242483. The next prime is 65242571. The reversal of 65242531 is 13524256.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 65242531 - 2⁷ = 65242403 is a prime.

It is a super-2 number, since 2×65242531² = 8513175702571922, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 65242531.

It is not a weakly prime, because it can be changed into another prime (65242571) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32621265 + 32621266.

It is an arithmetic number, because the mean of its divisors is an integer number (32621266).

Almost surely, 2^65242531 is an apocalyptic number.

65242531 is a deficient number, since it is larger than the sum of its proper divisors (1).

65242531 is an equidigital number, since it uses as much as digits as its factorization.

65242531 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7200, while the sum is 28.

The square root of 65242531 is about 8077.2848779773. The cubic root of 65242531 is about 402.5720324253.

Adding to 65242531 its reverse (13524256), we get a palindrome (78766787).

The spelling of 65242531 in words is "sixty-five million, two hundred forty-two thousand, five hundred thirty-one".