32070221 has 8 divisors (see below), whose sum is σ = 32453784. Its totient is φ = 31689280.

The previous prime is 32070209. The next prime is 32070223. The reversal of 32070221 is 12207023.

It can be written as a sum of positive squares in 4 ways, for example, as 23136100 + 8934121 = 4810^2 + 2989^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-32070221 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 32070221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (32070223) 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, 33611 + ... + 34551.

It is an arithmetic number, because the mean of its divisors is an integer number (4056723).

Almost surely, 2^32070221 is an apocalyptic number.

It is an amenable number.

32070221 is a deficient number, since it is larger than the sum of its proper divisors (383563).

32070221 is a wasteful number, since it uses less digits than its factorization.

32070221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1311.

The product of its (nonzero) digits is 168, while the sum is 17.

The square root of 32070221 is about 5663.0575663682. The cubic root of 32070221 is about 317.7122675864.

Adding to 32070221 its reverse (12207023), we get a palindrome (44277244).

It can be divided in two parts, 3207022 and 1, that added together give a palindrome (3207023).

The spelling of 32070221 in words is "thirty-two million, seventy thousand, two hundred twenty-one".