32142221 has 8 divisors (see below), whose sum is σ = 32991840. Its totient is φ = 31301712.

The previous prime is 32142217. The next prime is 32142239. The reversal of 32142221 is 12224123.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 32142221 - 2² = 32142217 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 32142221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (32142421) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5186 + ... + 9548.

It is an arithmetic number, because the mean of its divisors is an integer number (4123980).

Almost surely, 2^32142221 is an apocalyptic number.

It is an amenable number.

32142221 is a deficient number, since it is larger than the sum of its proper divisors (849619).

32142221 is a wasteful number, since it uses less digits than its factorization.

32142221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4555.

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

The square root of 32142221 is about 5669.4109923342. The cubic root of 32142221 is about 317.9498523299.

Adding to 32142221 its reverse (12224123), we get a palindrome (44366344).

The spelling of 32142221 in words is "thirty-two million, one hundred forty-two thousand, two hundred twenty-one".