32221421 has 4 divisors (see below), whose sum is σ = 32236032. Its totient is φ = 32206812.

The previous prime is 32221417. The next prime is 32221447. The reversal of 32221421 is 12412223.

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: 12412223 = 241 ⋅51503.

It is a cyclic number.

It is not a de Polignac number, because 32221421 - 2² = 32221417 is a prime.

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 32221421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (32221621) 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, 3245 + ... + 8658.

It is an arithmetic number, because the mean of its divisors is an integer number (8059008).

Almost surely, 2^32221421 is an apocalyptic number.

It is an amenable number.

32221421 is a deficient number, since it is larger than the sum of its proper divisors (14611).

32221421 is a wasteful number, since it uses less digits than its factorization.

32221421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14610.

The product of its digits is 192, while the sum is 17.

The square root of 32221421 is about 5676.3915474534. The cubic root of 32221421 is about 318.2107861097.

Adding to 32221421 its reverse (12412223), we get a palindrome (44633644).

The spelling of 32221421 in words is "thirty-two million, two hundred twenty-one thousand, four hundred twenty-one".