65531523 has 8 divisors (see below), whose sum is σ = 87466000. Its totient is φ = 43642368.

The previous prime is 65531491. The next prime is 65531533. The reversal of 65531523 is 32513556.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 65531523 - 2⁵ = 65531491 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65531533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7798 + ... + 13851.

It is an arithmetic number, because the mean of its divisors is an integer number (10933250).

Almost surely, 2^65531523 is an apocalyptic number.

65531523 is a deficient number, since it is larger than the sum of its proper divisors (21934477).

65531523 is a wasteful number, since it uses less digits than its factorization.

65531523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22661.

The product of its digits is 13500, while the sum is 30.

The square root of 65531523 is about 8095.1542913029. The cubic root of 65531523 is about 403.1655549849.

The spelling of 65531523 in words is "sixty-five million, five hundred thirty-one thousand, five hundred twenty-three".