3221571 has 4 divisors (see below), whose sum is σ = 4295432. Its totient is φ = 2147712.

The previous prime is 3221567. The next prime is 3221573. The reversal of 3221571 is 1751223.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 3221571 - 2² = 3221567 is a prime.

It is a D-number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3221573) 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, 536926 + ... + 536931.

It is an arithmetic number, because the mean of its divisors is an integer number (1073858).

Almost surely, 2^3221571 is an apocalyptic number.

3221571 is a deficient number, since it is larger than the sum of its proper divisors (1073861).

3221571 is a wasteful number, since it uses less digits than its factorization.

3221571 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1073860.

The product of its digits is 420, while the sum is 21.

The square root of 3221571 is about 1794.8735331493. The cubic root of 3221571 is about 147.6916363860.

Adding to 3221571 its product of digits (420), we get a triangular number (3221991 = T₂₅₃₈).

Adding to 3221571 its reverse (1751223), we get a palindrome (4972794).

The spelling of 3221571 in words is "three million, two hundred twenty-one thousand, five hundred seventy-one".