65235631 has 2 divisors, whose sum is σ = 65235632. Its totient is φ = 65235630.

The previous prime is 65235629. The next prime is 65235637. The reversal of 65235631 is 13653256.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 65235631 - 2¹ = 65235629 is a prime.

It is a super-2 number, since 2×65235631² = 8511375103936322, which contains 22 as substring.

Together with 65235629, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 65235593 and 65235602.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65235637) 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 as a sum of consecutive naturals, namely, 32617815 + 32617816.

It is an arithmetic number, because the mean of its divisors is an integer number (32617816).

Almost surely, 2^65235631 is an apocalyptic number.

65235631 is a deficient number, since it is larger than the sum of its proper divisors (1).

65235631 is an equidigital number, since it uses as much as digits as its factorization.

65235631 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 16200, while the sum is 31.

The square root of 65235631 is about 8076.8577429592. The cubic root of 65235631 is about 402.5578400219.

Adding to 65235631 its reverse (13653256), we get a palindrome (78888887).

The spelling of 65235631 in words is "sixty-five million, two hundred thirty-five thousand, six hundred thirty-one".