32561455 has 4 divisors (see below), whose sum is σ = 39073752. Its totient is φ = 26049160.

The previous prime is 32561453. The next prime is 32561467. The reversal of 32561455 is 55416523.

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

It is not a de Polignac number, because 32561455 - 2¹ = 32561453 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (32561453) 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, 3256141 + ... + 3256150.

It is an arithmetic number, because the mean of its divisors is an integer number (9768438).

Almost surely, 2^32561455 is an apocalyptic number.

32561455 is a deficient number, since it is larger than the sum of its proper divisors (6512297).

32561455 is an equidigital number, since it uses as much as digits as its factorization.

32561455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6512296.

The product of its digits is 18000, while the sum is 31.

The square root of 32561455 is about 5706.2645399596. The cubic root of 32561455 is about 319.3262353693.

Adding to 32561455 its reverse (55416523), we get a palindrome (87977978).

The spelling of 32561455 in words is "thirty-two million, five hundred sixty-one thousand, four hundred fifty-five".