3125816281 has 21 divisors (see below), whose sum is σ = 3669291381. Its totient is φ = 2662833852.

The previous prime is 3125816257. The next prime is 3125816297. The reversal of 3125816281 is 1826185213.

The square root of 3125816281 is 55909.

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

3125816281 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 3125816281 - 2⁷ = 3125816153 is a prime.

It is a super-2 number, since 2×3125816281² = 19541454845129341922, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 3125816281.

It is not an unprimeable number, because it can be changed into a prime (3125826281) by changing a digit.

It is a polite number, since it can be written in 20 ways as a sum of consecutive naturals, for example, 19176706 + ... + 19176868.

It is an arithmetic number, because the mean of its divisors is an integer number (174728161).

Almost surely, 2^3125816281 is an apocalyptic number.

3125816281 is the 55909-th square number.

3125816281 is the 27955-th centered octagonal number.

It is an amenable number.

3125816281 is a deficient number, since it is larger than the sum of its proper divisors (543475100).

3125816281 is an frugal number, since it uses more digits than its factorization.

3125816281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 368 (or 170 counting only the distinct ones).

The product of its digits is 23040, while the sum is 37.

The cubic root of 3125816281 is about 1462.1361550975.

The spelling of 3125816281 in words is "three billion, one hundred twenty-five million, eight hundred sixteen thousand, two hundred eighty-one".