65705231 has 4 divisors (see below), whose sum is σ = 65942712. Its totient is φ = 65467752.

The previous prime is 65705203. The next prime is 65705243. The reversal of 65705231 is 13250756.

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 65705231 - 2²² = 61510927 is a prime.

It is a super-2 number, since 2×65705231² = 8634354761526722, which contains 22 as substring.

It is a Duffinian number.

It is a zygodrome in base 4.

It is a junction number, because it is equal to n+sod(n) for n = 65705194 and 65705203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65705261) 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, 118325 + ... + 118878.

It is an arithmetic number, because the mean of its divisors is an integer number (16485678).

Almost surely, 2^65705231 is an apocalyptic number.

65705231 is a deficient number, since it is larger than the sum of its proper divisors (237481).

65705231 is a wasteful number, since it uses less digits than its factorization.

65705231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 237480.

The product of its (nonzero) digits is 6300, while the sum is 29.

The square root of 65705231 is about 8105.8763252347. The cubic root of 65705231 is about 403.5214716991.

Adding to 65705231 its reverse (13250756), we get a palindrome (78955987).

The spelling of 65705231 in words is "sixty-five million, seven hundred five thousand, two hundred thirty-one".