65430231 has 4 divisors (see below), whose sum is σ = 87240312. Its totient is φ = 43620152.

The previous prime is 65430227. The next prime is 65430271. The reversal of 65430231 is 13203456.

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 65430231 - 2² = 65430227 is a prime.

It is a super-2 number, since 2×65430231² = 8562230257426722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65430271) 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, 10905036 + ... + 10905041.

It is an arithmetic number, because the mean of its divisors is an integer number (21810078).

Almost surely, 2^65430231 is an apocalyptic number.

65430231 is a deficient number, since it is larger than the sum of its proper divisors (21810081).

65430231 is a wasteful number, since it uses less digits than its factorization.

65430231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21810080.

The product of its (nonzero) digits is 2160, while the sum is 24.

The square root of 65430231 is about 8088.8955364747. The cubic root of 65430231 is about 402.9577236878.

Adding to 65430231 its reverse (13203456), we get a palindrome (78633687).

The spelling of 65430231 in words is "sixty-five million, four hundred thirty thousand, two hundred thirty-one".