32101561 has 4 divisors (see below), whose sum is σ = 32269824. Its totient is φ = 31933300.

The previous prime is 32101549. The next prime is 32101567. The reversal of 32101561 is 16510123.

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 a de Polignac number, because none of the positive numbers 2^k-32101561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (32101567) 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, 83845 + ... + 84226.

It is an arithmetic number, because the mean of its divisors is an integer number (8067456).

Almost surely, 2^32101561 is an apocalyptic number.

It is an amenable number.

32101561 is a deficient number, since it is larger than the sum of its proper divisors (168263).

32101561 is a wasteful number, since it uses less digits than its factorization.

32101561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 168262.

The product of its (nonzero) digits is 180, while the sum is 19.

The square root of 32101561 is about 5665.8239471413. The cubic root of 32101561 is about 317.8157266049.

Adding to 32101561 its reverse (16510123), we get a palindrome (48611684).

The spelling of 32101561 in words is "thirty-two million, one hundred one thousand, five hundred sixty-one".