3125257215 has 16 divisors (see below), whose sum is σ = 5001842688. Its totient is φ = 1666326816.

The previous prime is 3125257171. The next prime is 3125257249. The reversal of 3125257215 is 5127525213.

It is a Cunningham number, because it is equal to 55904²-1.

It is not a de Polignac number, because 3125257215 - 2⁹ = 3125256703 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27954 + ... + 83856.

It is an arithmetic number, because the mean of its divisors is an integer number (312615168).

Almost surely, 2^3125257215 is an apocalyptic number.

3125257215 is a deficient number, since it is larger than the sum of its proper divisors (1876585473).

3125257215 is a wasteful number, since it uses less digits than its factorization.

3125257215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59638.

The product of its digits is 21000, while the sum is 33.

The square root of 3125257215 is about 55903.9999910561. Note that the first 5 decimals coincide. The cubic root of 3125257215 is about 1462.0489800712.

The spelling of 3125257215 in words is "three billion, one hundred twenty-five million, two hundred fifty-seven thousand, two hundred fifteen".