3158102809 has 3 divisors (see below), whose sum is σ = 3158159007. Its totient is φ = 3158046612.

The previous prime is 3158102807. The next prime is 3158102839. The reversal of 3158102809 is 9082018513.

The square root of 3158102809 is 56197.

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., 18966025 + 3139136784 = 4355^2 + 56028^2 .

It is not a de Polignac number, because 3158102809 - 2¹ = 3158102807 is a prime.

It is a super-2 number, since 2×3158102809² = 19947226704427380962, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3158102807) 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 2 ways as a sum of consecutive naturals, for example, 28099 + ... + 84295.

It is an arithmetic number, because the mean of its divisors is an integer number (1052719669).

Almost surely, 2^3158102809 is an apocalyptic number.

3158102809 is the 56197-th square number.

3158102809 is the 28099-th centered octagonal number.

It is an amenable number.

3158102809 is a deficient number, since it is larger than the sum of its proper divisors (56198).

3158102809 is an frugal number, since it uses more digits than its factorization.

3158102809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112394 (or 56197 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 37.

The cubic root of 3158102809 is about 1467.1530517408.

The spelling of 3158102809 in words is "three billion, one hundred fifty-eight million, one hundred two thousand, eight hundred nine".