3261437881 has 27 divisors (see below), whose sum is σ = 3711270927. Its totient is φ = 2864587440.

The previous prime is 3261437873. The next prime is 3261437891. The reversal of 3261437881 is 1887341623.

The square root of 3261437881 is 57109.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 482461225 + 2778976656 = 21965^2 + 52716^2 .

It is not a de Polignac number, because 3261437881 - 2³ = 3261437873 is a prime.

It is a super-2 number, since 2×3261437881² = 21273954103243540322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (3261437821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 17075496 + ... + 17075686.

Almost surely, 2^3261437881 is an apocalyptic number.

3261437881 is the 57109-th square number.

3261437881 is the 28555-th centered octagonal number.

It is an amenable number.

3261437881 is a deficient number, since it is larger than the sum of its proper divisors (449833046).

3261437881 is an equidigital number, since it uses as much as digits as its factorization.

3261437881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 454 (or 227 counting only the distinct ones).

The product of its digits is 193536, while the sum is 43.

The cubic root of 3261437881 is about 1482.9836754537.

The spelling of 3261437881 in words is "three billion, two hundred sixty-one million, four hundred thirty-seven thousand, eight hundred eighty-one".