51020126515 has 16 divisors (see below), whose sum is σ = 61525271808. Its totient is φ = 40615514496.

The previous prime is 51020126449. The next prime is 51020126519. The reversal of 51020126515 is 51562102015.

It is not a de Polignac number, because 51020126515 - 2¹³ = 51020118323 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51020126519) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2976309 + ... + 2993401.

It is an arithmetic number, because the mean of its divisors is an integer number (3845329488).

Almost surely, 2^51020126515 is an apocalyptic number.

51020126515 is a deficient number, since it is larger than the sum of its proper divisors (10505145293).

51020126515 is a wasteful number, since it uses less digits than its factorization.

51020126515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19998.

The product of its (nonzero) digits is 3000, while the sum is 28.

The spelling of 51020126515 in words is "fifty-one billion, twenty million, one hundred twenty-six thousand, five hundred fifteen".