65531311 has 4 divisors (see below), whose sum is σ = 69386112. Its totient is φ = 61676512.

The previous prime is 65531287. The next prime is 65531317. The reversal of 65531311 is 11313556.

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 65531311 - 2¹⁷ = 65400239 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65531317) 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, 1927375 + ... + 1927408.

It is an arithmetic number, because the mean of its divisors is an integer number (17346528).

Almost surely, 2^65531311 is an apocalyptic number.

65531311 is a deficient number, since it is larger than the sum of its proper divisors (3854801).

65531311 is a wasteful number, since it uses less digits than its factorization.

65531311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3854800.

The product of its digits is 1350, while the sum is 25.

The square root of 65531311 is about 8095.1411970391. The cubic root of 65531311 is about 403.1651202263.

Adding to 65531311 its reverse (11313556), we get a palindrome (76844867).

The spelling of 65531311 in words is "sixty-five million, five hundred thirty-one thousand, three hundred eleven".