65320631 has 4 divisors (see below), whose sum is σ = 65436000. Its totient is φ = 65205264.

The previous prime is 65320603. The next prime is 65320649. The reversal of 65320631 is 13602356.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 65320631 - 2¹⁴ = 65304247 is a prime.

It is a super-2 number, since 2×65320631² = 8533569668476322, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 65320631.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65320601) 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 in 3 ways as a sum of consecutive naturals, for example, 56831 + ... + 57968.

It is an arithmetic number, because the mean of its divisors is an integer number (16359000).

Almost surely, 2^65320631 is an apocalyptic number.

65320631 is a deficient number, since it is larger than the sum of its proper divisors (115369).

65320631 is a wasteful number, since it uses less digits than its factorization.

65320631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115368.

The product of its (nonzero) digits is 3240, while the sum is 26.

The square root of 65320631 is about 8082.1179773621. The cubic root of 65320631 is about 402.7326042585.

Adding to 65320631 its reverse (13602356), we get a palindrome (78922987).

The spelling of 65320631 in words is "sixty-five million, three hundred twenty thousand, six hundred thirty-one".