51042215563 has 8 divisors (see below), whose sum is σ = 52482394800. Its totient is φ = 49619707488.

The previous prime is 51042215519. The next prime is 51042215597. The reversal of 51042215563 is 36551224015.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 51042215563 - 2²¹ = 51040118411 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51042215863) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 4411933 + ... + 4423486.

It is an arithmetic number, because the mean of its divisors is an integer number (6560299350).

Almost surely, 2^51042215563 is an apocalyptic number.

51042215563 is a gapful number since it is divisible by the number (53) formed by its first and last digit.

51042215563 is a deficient number, since it is larger than the sum of its proper divisors (1440179237).

51042215563 is a wasteful number, since it uses less digits than its factorization.

51042215563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8835581.

The product of its (nonzero) digits is 36000, while the sum is 34.

Adding to 51042215563 its reverse (36551224015), we get a palindrome (87593439578).

The spelling of 51042215563 in words is "fifty-one billion, forty-two million, two hundred fifteen thousand, five hundred sixty-three".