51205525 has 24 divisors (see below), whose sum is σ = 72941760. Its totient is φ = 34930560.

The previous prime is 51205519. The next prime is 51205541. The reversal of 51205525 is 52550215.

It is a happy number.

51205525 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 51205525 - 2⁵ = 51205493 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a self number, because there is not a number n which added to its sum of digits gives 51205525.

It is a congruent 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 23 ways as a sum of consecutive naturals, for example, 39081 + ... + 40369.

It is an arithmetic number, because the mean of its divisors is an integer number (3039240).

Almost surely, 2^51205525 is an apocalyptic number.

It is an amenable number.

51205525 is a deficient number, since it is larger than the sum of its proper divisors (21736235).

51205525 is a wasteful number, since it uses less digits than its factorization.

51205525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1533 (or 1528 counting only the distinct ones).

The product of its (nonzero) digits is 2500, while the sum is 25.

The square root of 51205525 is about 7155.8035886964. The cubic root of 51205525 is about 371.3404628640.

The spelling of 51205525 in words is "fifty-one million, two hundred five thousand, five hundred twenty-five".