51166520 has 16 divisors (see below), whose sum is σ = 115124760. Its totient is φ = 20466592.

The previous prime is 51166519. The next prime is 51166529. The reversal of 51166520 is 2566115.

51166520 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 51166520.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51166529) 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 3 ways as a sum of consecutive naturals, for example, 639542 + ... + 639621.

Almost surely, 2^51166520 is an apocalyptic number.

It is an amenable number.

51166520 is an abundant number, since it is smaller than the sum of its proper divisors (63958240).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51166520 is a wasteful number, since it uses less digits than its factorization.

51166520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1279174 (or 1279170 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 26.

The square root of 51166520 is about 7153.0776593016. The cubic root of 51166520 is about 371.2461513354.

The spelling of 51166520 in words is "fifty-one million, one hundred sixty-six thousand, five hundred twenty".