32543001521 has 4 divisors (see below), whose sum is σ = 32543441700. Its totient is φ = 32542561344.

The previous prime is 32543001503. The next prime is 32543001539. The reversal of 32543001521 is 12510034523.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (32543001503) and next prime (32543001539).

It can be written as a sum of positive squares in 2 ways, for example, as 15784404496 + 16758597025 = 125636^2 + 129455^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-32543001521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (32543001551) 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, 79076 + ... + 267093.

It is an arithmetic number, because the mean of its divisors is an integer number (8135860425).

Almost surely, 2^32543001521 is an apocalyptic number.

It is an amenable number.

32543001521 is a deficient number, since it is larger than the sum of its proper divisors (440179).

32543001521 is an equidigital number, since it uses as much as digits as its factorization.

32543001521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 440178.

The product of its (nonzero) digits is 3600, while the sum is 26.

The spelling of 32543001521 in words is "thirty-two billion, five hundred forty-three million, one thousand, five hundred twenty-one".