32403023221 has 4 divisors (see below), whose sum is σ = 32479990444. Its totient is φ = 32326056000.

The previous prime is 32403023209. The next prime is 32403023297. The reversal of 32403023221 is 12232030423.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12232030423 = 107339 ⋅113957.

It can be written as a sum of positive squares in 2 ways, for example, as 2163552196 + 30239471025 = 46514^2 + 173895^2 .

It is a cyclic number.

It is not a de Polignac number, because 32403023221 - 2⁵ = 32403023189 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 32403023192 and 32403023201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (32403023021) 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, 38482980 + ... + 38483821.

It is an arithmetic number, because the mean of its divisors is an integer number (8119997611).

Almost surely, 2^32403023221 is an apocalyptic number.

It is an amenable number.

32403023221 is a deficient number, since it is larger than the sum of its proper divisors (76967223).

32403023221 is an equidigital number, since it uses as much as digits as its factorization.

32403023221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76967222.

The product of its (nonzero) digits is 1728, while the sum is 22.

Adding to 32403023221 its reverse (12232030423), we get a palindrome (44635053644).

The spelling of 32403023221 in words is "thirty-two billion, four hundred three million, twenty-three thousand, two hundred twenty-one".