51525515 has 8 divisors (see below), whose sum is σ = 62043408. Its totient is φ = 41078560.

The previous prime is 51525443. The next prime is 51525557. The reversal of 51525515 is 51552515.

51525515 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 51525515 - 2¹⁸ = 51263371 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 16121 + ... + 19050.

It is an arithmetic number, because the mean of its divisors is an integer number (7755426).

Almost surely, 2^51525515 is an apocalyptic number.

51525515 is a deficient number, since it is larger than the sum of its proper divisors (10517893).

51525515 is a wasteful number, since it uses less digits than its factorization.

51525515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35469.

The product of its digits is 6250, while the sum is 29.

The square root of 51525515 is about 7178.1275413578. The cubic root of 51525515 is about 372.1123754804.

Subtracting 51525515 from its reverse (51552515), we obtain a cube (27000 = 30³).

The spelling of 51525515 in words is "fifty-one million, five hundred twenty-five thousand, five hundred fifteen".