3125346521 has 16 divisors (see below), whose sum is σ = 3663921600. Its totient is φ = 2634170880.

The previous prime is 3125346493. The next prime is 3125346557. The reversal of 3125346521 is 1256435213.

It is a happy number.

It is not a de Polignac number, because 3125346521 - 2²⁶ = 3058237657 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3125336521) 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 15 ways as a sum of consecutive naturals, for example, 112196 + ... + 137253.

It is an arithmetic number, because the mean of its divisors is an integer number (228995100).

Almost surely, 2^3125346521 is an apocalyptic number.

It is an amenable number.

3125346521 is a deficient number, since it is larger than the sum of its proper divisors (538575079).

3125346521 is a wasteful number, since it uses less digits than its factorization.

3125346521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 249544.

The product of its digits is 21600, while the sum is 32.

The square root of 3125346521 is about 55904.7987296261. The cubic root of 3125346521 is about 1462.0629062319.

The spelling of 3125346521 in words is "three billion, one hundred twenty-five million, three hundred forty-six thousand, five hundred twenty-one".