65321131 has 4 divisors (see below), whose sum is σ = 65446552. Its totient is φ = 65195712.

The previous prime is 65321129. The next prime is 65321141. The reversal of 65321131 is 13112356.

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 65321131 - 2¹ = 65321129 is a prime.

It is a super-2 number, since 2×65321131² = 8533700310238322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65321141) 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, 61926 + ... + 62971.

It is an arithmetic number, because the mean of its divisors is an integer number (16361638).

Almost surely, 2^65321131 is an apocalyptic number.

65321131 is a deficient number, since it is larger than the sum of its proper divisors (125421).

65321131 is a wasteful number, since it uses less digits than its factorization.

65321131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125420.

The product of its digits is 540, while the sum is 22.

The square root of 65321131 is about 8082.1489097888. The cubic root of 65321131 is about 402.7336318347.

Adding to 65321131 its reverse (13112356), we get a palindrome (78433487).

The spelling of 65321131 in words is "sixty-five million, three hundred twenty-one thousand, one hundred thirty-one".