65521533 has 32 divisors (see below), whose sum is σ = 110177280. Its totient is φ = 33644160.

The previous prime is 65521529. The next prime is 65521537. The reversal of 65521533 is 33512556.

It is an interprime number because it is at equal distance from previous prime (65521529) and next prime (65521537).

It is not a de Polignac number, because 65521533 - 2² = 65521529 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 65521533.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65521537) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 18966 + ... + 22152.

It is an arithmetic number, because the mean of its divisors is an integer number (3443040).

Almost surely, 2^65521533 is an apocalyptic number.

It is an amenable number.

65521533 is a deficient number, since it is larger than the sum of its proper divisors (44655747).

65521533 is a wasteful number, since it uses less digits than its factorization.

65521533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3297.

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

The square root of 65521533 is about 8094.5372319855. The cubic root of 65521533 is about 403.1450669898.

The spelling of 65521533 in words is "sixty-five million, five hundred twenty-one thousand, five hundred thirty-three".