65313731 has 4 divisors (see below), whose sum is σ = 74644272. Its totient is φ = 55983192.

The previous prime is 65313707. The next prime is 65313733. The reversal of 65313731 is 13731356.

It is a happy number.

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 65313731 - 2⁶ = 65313667 is a prime.

It is a super-2 number, since 2×65313731² = 8531766914280722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 65313694 and 65313703.

It is not an unprimeable number, because it can be changed into a prime (65313733) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4665260 + ... + 4665273.

It is an arithmetic number, because the mean of its divisors is an integer number (18661068).

Almost surely, 2^65313731 is an apocalyptic number.

65313731 is a deficient number, since it is larger than the sum of its proper divisors (9330541).

65313731 is an equidigital number, since it uses as much as digits as its factorization.

65313731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9330540.

The product of its digits is 5670, while the sum is 29.

The square root of 65313731 is about 8081.6910977839. The cubic root of 65313731 is about 402.7184231706.

The spelling of 65313731 in words is "sixty-five million, three hundred thirteen thousand, seven hundred thirty-one".