3220631 has 4 divisors (see below), whose sum is σ = 3266064. Its totient is φ = 3175200.

The previous prime is 3220627. The next prime is 3220639. The reversal of 3220631 is 1360223.

3220631 = T₁₃₈ + T₁₃₉ + ... + T₂₇₉.

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

It is a cyclic number.

It is not a de Polignac number, because 3220631 - 2² = 3220627 is a prime.

It is a super-2 number, since 2×3220631² = 20744928076322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3220639) 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, 22610 + ... + 22751.

It is an arithmetic number, because the mean of its divisors is an integer number (816516).

Almost surely, 2^3220631 is an apocalyptic number.

3220631 is a deficient number, since it is larger than the sum of its proper divisors (45433).

3220631 is an equidigital number, since it uses as much as digits as its factorization.

3220631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45432.

The product of its (nonzero) digits is 216, while the sum is 17.

The square root of 3220631 is about 1794.6116571559. The cubic root of 3220631 is about 147.6772703471.

Adding to 3220631 its reverse (1360223), we get a palindrome (4580854).

The spelling of 3220631 in words is "three million, two hundred twenty thousand, six hundred thirty-one".