3221220131 has 8 divisors (see below), whose sum is σ = 3233821344. Its totient is φ = 3208633920.

The previous prime is 3221220083. The next prime is 3221220161. The reversal of 3221220131 is 1310221223.

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 3221220131 - 2¹⁴ = 3221203747 is a prime.

It is a super-2 number, since 2×3221220131² = 20752518264719314322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3221220161) 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, 617225 + ... + 622421.

It is an arithmetic number, because the mean of its divisors is an integer number (404227668).

Almost surely, 2^3221220131 is an apocalyptic number.

3221220131 is a deficient number, since it is larger than the sum of its proper divisors (12601213).

3221220131 is a wasteful number, since it uses less digits than its factorization.

3221220131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7501.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 3221220131 is about 56755.7938099715. The cubic root of 3221220131 is about 1476.8627437493.

Adding to 3221220131 its reverse (1310221223), we get a palindrome (4531441354).

The spelling of 3221220131 in words is "three billion, two hundred twenty-one million, two hundred twenty thousand, one hundred thirty-one".