51021510036 has 48 divisors (see below), whose sum is σ = 136172830080. Its totient is φ = 14565202560.

The previous prime is 51021510019. The next prime is 51021510061. The reversal of 51021510036 is 63001512015.

It is a junction number, because it is equal to n+sod(n) for n = 51021509988 and 51021510015.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 157951 + ... + 356358.

It is an arithmetic number, because the mean of its divisors is an integer number (2836933960).

Almost surely, 2^51021510036 is an apocalyptic number.

It is an amenable number.

51021510036 is an abundant number, since it is smaller than the sum of its proper divisors (85151320044).

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

51021510036 is a wasteful number, since it uses less digits than its factorization.

51021510036 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 515504 (or 515502 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 24.

The spelling of 51021510036 in words is "fifty-one billion, twenty-one million, five hundred ten thousand, thirty-six".