32320421 has 4 divisors (see below), whose sum is σ = 36937632. Its totient is φ = 27703212.

The previous prime is 32320399. The next prime is 32320429. The reversal of 32320421 is 12402323.

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, and also an emirpimes, since its reverse is a distinct semiprime: 12402323 = 97 ⋅127859.

It is a cyclic number.

It is not a de Polignac number, because 32320421 - 2¹⁴ = 32304037 is a prime.

It is a super-2 number, since 2×32320421² = 2089219227234482, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 32320421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (32320429) 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, 2308595 + ... + 2308608.

It is an arithmetic number, because the mean of its divisors is an integer number (9234408).

Almost surely, 2^32320421 is an apocalyptic number.

It is an amenable number.

32320421 is a deficient number, since it is larger than the sum of its proper divisors (4617211).

32320421 is an equidigital number, since it uses as much as digits as its factorization.

32320421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4617210.

The product of its (nonzero) digits is 288, while the sum is 17.

The square root of 32320421 is about 5685.1051881210. The cubic root of 32320421 is about 318.5363527434.

Adding to 32320421 its reverse (12402323), we get a palindrome (44722744).

The spelling of 32320421 in words is "thirty-two million, three hundred twenty thousand, four hundred twenty-one".