3228531261 has 16 divisors (see below), whose sum is σ = 4374881280. Its totient is φ = 2117486000.

The previous prime is 3228531247. The next prime is 3228531263. The reversal of 3228531261 is 1621358223.

It is a cyclic number.

It is not a de Polignac number, because 3228531261 - 2¹³ = 3228523069 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3228531263) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32386 + ... + 86636.

It is an arithmetic number, because the mean of its divisors is an integer number (273430080).

Almost surely, 2^3228531261 is an apocalyptic number.

It is an amenable number.

3228531261 is a deficient number, since it is larger than the sum of its proper divisors (1146350019).

3228531261 is a wasteful number, since it uses less digits than its factorization.

3228531261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54576.

The product of its digits is 17280, while the sum is 33.

The square root of 3228531261 is about 56820.1659712465. The cubic root of 3228531261 is about 1477.9792334006.

Adding to 3228531261 its reverse (1621358223), we get a palindrome (4849889484).

It can be divided in two parts, 32285 and 31261, that added together give a triangular number (63546 = T₃₅₆).

The spelling of 3228531261 in words is "three billion, two hundred twenty-eight million, five hundred thirty-one thousand, two hundred sixty-one".