3125720211 has 8 divisors (see below), whose sum is σ = 4169154000. Its totient is φ = 2083049952.

The previous prime is 3125720203. The next prime is 3125720219. The reversal of 3125720211 is 1120275213.

It is an interprime number because it is at equal distance from previous prime (3125720203) and next prime (3125720219).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 3125720211 - 2³ = 3125720203 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3125720219) 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 7 ways as a sum of consecutive naturals, for example, 181260 + ... + 197753.

It is an arithmetic number, because the mean of its divisors is an integer number (521144250).

Almost surely, 2^3125720211 is an apocalyptic number.

3125720211 is a deficient number, since it is larger than the sum of its proper divisors (1043433789).

3125720211 is a wasteful number, since it uses less digits than its factorization.

3125720211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 381765.

The product of its (nonzero) digits is 840, while the sum is 24.

The square root of 3125720211 is about 55908.1408293998. The cubic root of 3125720211 is about 1462.1211756653.

Adding to 3125720211 its reverse (1120275213), we get a palindrome (4245995424).

The spelling of 3125720211 in words is "three billion, one hundred twenty-five million, seven hundred twenty thousand, two hundred eleven".