32505400221 has 16 divisors (see below), whose sum is σ = 49550626944. Its totient is φ = 18567543744.

The previous prime is 32505400183. The next prime is 32505400223. The reversal of 32505400221 is 12200450523.

It is not a de Polignac number, because 32505400221 - 2⁶ = 32505400157 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 32505400191 and 32505400200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (32505400223) 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 15 ways as a sum of consecutive naturals, for example, 232890 + ... + 345323.

It is an arithmetic number, because the mean of its divisors is an integer number (3096914184).

Almost surely, 2^32505400221 is an apocalyptic number.

It is an amenable number.

32505400221 is a deficient number, since it is larger than the sum of its proper divisors (17045226723).

32505400221 is a wasteful number, since it uses less digits than its factorization.

32505400221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 580900.

The product of its (nonzero) digits is 2400, while the sum is 24.

Adding to 32505400221 its reverse (12200450523), we get a palindrome (44705850744).

The spelling of 32505400221 in words is "thirty-two billion, five hundred five million, four hundred thousand, two hundred twenty-one".