3220013261 has 4 divisors (see below), whose sum is σ = 3253209372. Its totient is φ = 3186817152.

The previous prime is 3220013249. The next prime is 3220013273. The reversal of 3220013261 is 1623100223.

It is a happy number.

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

It is an interprime number because it is at equal distance from previous prime (3220013249) and next prime (3220013273).

It can be written as a sum of positive squares in 2 ways, for example, as 2115448036 + 1104565225 = 45994^2 + 33235^2 .

It is a cyclic number.

It is not a de Polignac number, because 3220013261 - 2²⁶ = 3152904397 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3220013221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16597910 + ... + 16598103.

It is an arithmetic number, because the mean of its divisors is an integer number (813302343).

Almost surely, 2^3220013261 is an apocalyptic number.

It is an amenable number.

3220013261 is a deficient number, since it is larger than the sum of its proper divisors (33196111).

3220013261 is an equidigital number, since it uses as much as digits as its factorization.

3220013261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33196110.

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 3220013261 is about 56745.1606835332. The cubic root of 3220013261 is about 1476.6782790733.

Adding to 3220013261 its reverse (1623100223), we get a palindrome (4843113484).

The spelling of 3220013261 in words is "three billion, two hundred twenty million, thirteen thousand, two hundred sixty-one".