65761231 has 2 divisors, whose sum is σ = 65761232. Its totient is φ = 65761230.

The previous prime is 65761217. The next prime is 65761271. The reversal of 65761231 is 13216756.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 65761231 - 2¹⁹ = 65236943 is a prime.

It is a super-2 number, since 2×65761231² = 8649079005270722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 65761193 and 65761202.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65761271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32880615 + 32880616.

It is an arithmetic number, because the mean of its divisors is an integer number (32880616).

Almost surely, 2^65761231 is an apocalyptic number.

65761231 is a deficient number, since it is larger than the sum of its proper divisors (1).

65761231 is an equidigital number, since it uses as much as digits as its factorization.

65761231 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7560, while the sum is 31.

The square root of 65761231 is about 8109.3298736702. The cubic root of 65761231 is about 403.6360784323.

Adding to 65761231 its reverse (13216756), we get a palindrome (78977987).

The spelling of 65761231 in words is "sixty-five million, seven hundred sixty-one thousand, two hundred thirty-one".