51520875506 has 32 divisors (see below), whose sum is σ = 83155438080. Its totient is φ = 23885971200.

The previous prime is 51520875491. The next prime is 51520875509. The reversal of 51520875506 is 60557802515.

It is a super-2 number, since 2×51520875506² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (51520875509) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 126170 + ... + 344906.

It is an arithmetic number, because the mean of its divisors is an integer number (2598607440).

Almost surely, 2^51520875506 is an apocalyptic number.

51520875506 is a deficient number, since it is larger than the sum of its proper divisors (31634562574).

51520875506 is a wasteful number, since it uses less digits than its factorization.

51520875506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 218930.

The product of its (nonzero) digits is 420000, while the sum is 44.

The spelling of 51520875506 in words is "fifty-one billion, five hundred twenty million, eight hundred seventy-five thousand, five hundred six".