65531133 has 32 divisors (see below), whose sum is σ = 103040000. Its totient is φ = 41045616.

The previous prime is 65531119. The next prime is 65531143. The reversal of 65531133 is 33113556.

65531133 is a `hidden beast` number, since 655 + 3 + 1 + 1 + 3 + 3 = 666.

It is not a de Polignac number, because 65531133 - 2⁶ = 65531069 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 65531097 and 65531106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65531143) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 70848 + ... + 71766.

It is an arithmetic number, because the mean of its divisors is an integer number (3220000).

Almost surely, 2^65531133 is an apocalyptic number.

It is an amenable number.

65531133 is a deficient number, since it is larger than the sum of its proper divisors (37508867).

65531133 is a wasteful number, since it uses less digits than its factorization.

65531133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1086 (or 1080 counting only the distinct ones).

The product of its digits is 4050, while the sum is 27.

The square root of 65531133 is about 8095.1302027824. The cubic root of 65531133 is about 403.1647551923.

Adding to 65531133 its reverse (33113556), we get a palindrome (98644689).

The spelling of 65531133 in words is "sixty-five million, five hundred thirty-one thousand, one hundred thirty-three".