65308631 has 2 divisors, whose sum is σ = 65308632. Its totient is φ = 65308630.

The previous prime is 65308619. The next prime is 65308673. The reversal of 65308631 is 13680356.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-65308631 is a prime.

It is a super-2 number, since 2×65308631² = 8530434566188322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65308231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32654315 + 32654316.

It is an arithmetic number, because the mean of its divisors is an integer number (32654316).

Almost surely, 2^65308631 is an apocalyptic number.

65308631 is a deficient number, since it is larger than the sum of its proper divisors (1).

65308631 is an equidigital number, since it uses as much as digits as its factorization.

65308631 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12960, while the sum is 32.

The square root of 65308631 is about 8081.3755636030. The cubic root of 65308631 is about 402.7079408550.

Adding to 65308631 its reverse (13680356), we get a palindrome (78988987).

The spelling of 65308631 in words is "sixty-five million, three hundred eight thousand, six hundred thirty-one".