65705131 has 4 divisors (see below), whose sum is σ = 65740000. Its totient is φ = 65670264.

The previous prime is 65705099. The next prime is 65705141. The reversal of 65705131 is 13150756.

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 65705131 - 2⁵ = 65705099 is a prime.

It is a super-2 number, since 2×65705131² = 8634328479454322, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 65705131.

It is not an unprimeable number, because it can be changed into a prime (65705141) 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, 14436 + ... + 18433.

It is an arithmetic number, because the mean of its divisors is an integer number (16435000).

Almost surely, 2^65705131 is an apocalyptic number.

65705131 is a deficient number, since it is larger than the sum of its proper divisors (34869).

65705131 is a wasteful number, since it uses less digits than its factorization.

65705131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34868.

The product of its (nonzero) digits is 3150, while the sum is 28.

The square root of 65705131 is about 8105.8701568678. The cubic root of 65705131 is about 403.5212669860.

Adding to 65705131 its reverse (13150756), we get a palindrome (78855887).

The spelling of 65705131 in words is "sixty-five million, seven hundred five thousand, one hundred thirty-one".