32231561 has 4 divisors (see below), whose sum is σ = 32256000. Its totient is φ = 32207124.

The previous prime is 32231539. The next prime is 32231567. The reversal of 32231561 is 16513223.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 32231561 - 2⁶ = 32231497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (32231567) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10121 + ... + 12918.

It is an arithmetic number, because the mean of its divisors is an integer number (8064000).

Almost surely, 2^32231561 is an apocalyptic number.

It is an amenable number.

32231561 is a deficient number, since it is larger than the sum of its proper divisors (24439).

32231561 is a wasteful number, since it uses less digits than its factorization.

32231561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24438.

The product of its digits is 1080, while the sum is 23.

The square root of 32231561 is about 5677.2846502531. The cubic root of 32231561 is about 318.2441626530.

Adding to 32231561 its reverse (16513223), we get a palindrome (48744784).

The spelling of 32231561 in words is "thirty-two million, two hundred thirty-one thousand, five hundred sixty-one".