51021509975 has 6 divisors (see below), whose sum is σ = 63266672400. Its totient is φ = 40817207960.

The previous prime is 51021509953. The next prime is 51021510011. The reversal of 51021509975 is 57990512015.

It is not a de Polignac number, because 51021509975 - 2¹⁴ = 51021493591 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1020430175 + ... + 1020430224.

It is an arithmetic number, because the mean of its divisors is an integer number (10544445400).

Almost surely, 2^51021509975 is an apocalyptic number.

51021509975 is a deficient number, since it is larger than the sum of its proper divisors (12245162425).

51021509975 is a wasteful number, since it uses less digits than its factorization.

51021509975 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2040860409 (or 2040860404 counting only the distinct ones).

The product of its (nonzero) digits is 141750, while the sum is 44.

The spelling of 51021509975 in words is "fifty-one billion, twenty-one million, five hundred nine thousand, nine hundred seventy-five".