65112731 has 2 divisors, whose sum is σ = 65112732. Its totient is φ = 65112730.

The previous prime is 65112727. The next prime is 65112787. The reversal of 65112731 is 13721156.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 65112731 - 2² = 65112727 is a prime.

It is a super-2 number, since 2×65112731² = 8479335476556722, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 65112731.

It is not a weakly prime, because it can be changed into another prime (65112721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32556365 + 32556366.

It is an arithmetic number, because the mean of its divisors is an integer number (32556366).

Almost surely, 2^65112731 is an apocalyptic number.

65112731 is a deficient number, since it is larger than the sum of its proper divisors (1).

65112731 is an equidigital number, since it uses as much as digits as its factorization.

65112731 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1260, while the sum is 26.

The square root of 65112731 is about 8069.2459994723. The cubic root of 65112731 is about 402.3048828611.

Adding to 65112731 its reverse (13721156), we get a palindrome (78833887).

The spelling of 65112731 in words is "sixty-five million, one hundred twelve thousand, seven hundred thirty-one".