3159451681 has 3 divisors (see below), whose sum is σ = 3159507891. Its totient is φ = 3159395472.

The previous prime is 3159451679. The next prime is 3159451693. The reversal of 3159451681 is 1861549513.

The square root of 3159451681 is 56209.

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

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 2280922081 + 878529600 = 47759^2 + 29640^2 .

It is not a de Polignac number, because 3159451681 - 2¹ = 3159451679 is a prime.

It is a super-2 number, since 2×3159451681² = 19964269849147451522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3159451481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 28105 + ... + 84313.

It is an arithmetic number, because the mean of its divisors is an integer number (1053169297).

Almost surely, 2^3159451681 is an apocalyptic number.

3159451681 is the 56209-th square number.

3159451681 is the 28105-th centered octagonal number.

It is an amenable number.

3159451681 is a deficient number, since it is larger than the sum of its proper divisors (56210).

3159451681 is an frugal number, since it uses more digits than its factorization.

3159451681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112418 (or 56209 counting only the distinct ones).

The product of its digits is 129600, while the sum is 43.

The cubic root of 3159451681 is about 1467.3619028670.

Multiplying 3159451681 by its product of digits (129600), we get a square (409464937857600 = 20235240²).

The spelling of 3159451681 in words is "three billion, one hundred fifty-nine million, four hundred fifty-one thousand, six hundred eighty-one".