65013631 has 2 divisors, whose sum is σ = 65013632. Its totient is φ = 65013630.

The previous prime is 65013623. The next prime is 65013647. The reversal of 65013631 is 13631056.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 65013631 - 2³ = 65013623 is a prime.

It is a super-2 number, since 2×65013631² = 8453544431608322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 65013596 and 65013605.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65013031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32506815 + 32506816.

It is an arithmetic number, because the mean of its divisors is an integer number (32506816).

Almost surely, 2^65013631 is an apocalyptic number.

65013631 is a deficient number, since it is larger than the sum of its proper divisors (1).

65013631 is an equidigital number, since it uses as much as digits as its factorization.

65013631 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1620, while the sum is 25.

The square root of 65013631 is about 8063.1030627172. The cubic root of 65013631 is about 402.1006797985.

Adding to 65013631 its reverse (13631056), we get a palindrome (78644687).

The spelling of 65013631 in words is "sixty-five million, thirteen thousand, six hundred thirty-one".