3125208811 has 4 divisors (see below), whose sum is σ = 3209673952. Its totient is φ = 3040743672.

The previous prime is 3125208773. The next prime is 3125208841. The reversal of 3125208811 is 1188025213.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1188025213 = 10639 ⋅111667.

It is a cyclic number.

It is not a de Polignac number, because 3125208811 - 2⁷ = 3125208683 is a prime.

It is a super-2 number, since 2×3125208811² = 19533860224704067442, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3125208841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42232515 + ... + 42232588.

It is an arithmetic number, because the mean of its divisors is an integer number (802418488).

Almost surely, 2^3125208811 is an apocalyptic number.

3125208811 is a deficient number, since it is larger than the sum of its proper divisors (84465141).

3125208811 is an equidigital number, since it uses as much as digits as its factorization.

3125208811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84465140.

The product of its (nonzero) digits is 3840, while the sum is 31.

The square root of 3125208811 is about 55903.5670686585. The cubic root of 3125208811 is about 1462.0414319581.

The spelling of 3125208811 in words is "three billion, one hundred twenty-five million, two hundred eight thousand, eight hundred eleven".