51525012 has 48 divisors (see below), whose sum is σ = 149893632. Its totient is φ = 13382880.

The previous prime is 51524999. The next prime is 51525013. The reversal of 51525012 is 21052515.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a self number, because there is not a number n which added to its sum of digits gives 51525012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51525013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26958 + ... + 28805.

It is an arithmetic number, because the mean of its divisors is an integer number (3122784).

Almost surely, 2^51525012 is an apocalyptic number.

It is an amenable number.

51525012 is an abundant number, since it is smaller than the sum of its proper divisors (98368620).

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

51525012 is a wasteful number, since it uses less digits than its factorization.

51525012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55788 (or 55786 counting only the distinct ones).

The product of its (nonzero) digits is 500, while the sum is 21.

The square root of 51525012 is about 7178.0925042799. The cubic root of 51525012 is about 372.1111646038. Note that the first 4 decimals are identical.

Adding to 51525012 its reverse (21052515), we get a palindrome (72577527).

The spelling of 51525012 in words is "fifty-one million, five hundred twenty-five thousand, twelve".