65224231 has 2 divisors, whose sum is σ = 65224232. Its totient is φ = 65224230.

The previous prime is 65224213. The next prime is 65224241. The reversal of 65224231 is 13242256.

Together with previous prime (65224213) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 65224231 - 2¹⁷ = 65093159 is a prime.

It is a super-2 number, since 2×65224231² = 8508400619082722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 65224196 and 65224205.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65224241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32612115 + 32612116.

It is an arithmetic number, because the mean of its divisors is an integer number (32612116).

Almost surely, 2^65224231 is an apocalyptic number.

65224231 is a deficient number, since it is larger than the sum of its proper divisors (1).

65224231 is an equidigital number, since it uses as much as digits as its factorization.

65224231 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2880, while the sum is 25.

The square root of 65224231 is about 8076.1519921309. The cubic root of 65224231 is about 402.5343895105.

Adding to 65224231 its reverse (13242256), we get a palindrome (78466487).

The spelling of 65224231 in words is "sixty-five million, two hundred twenty-four thousand, two hundred thirty-one".