51021043363 has 4 divisors (see below), whose sum is σ = 51021692680. Its totient is φ = 51020394048.

The previous prime is 51021043357. The next prime is 51021043427. The reversal of 51021043363 is 36334012015.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 51021043363 - 2¹⁷ = 51020912291 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51021043063) 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 3 ways as a sum of consecutive naturals, for example, 187470 + ... + 370387.

It is an arithmetic number, because the mean of its divisors is an integer number (12755423170).

Almost surely, 2^51021043363 is an apocalyptic number.

51021043363 is a deficient number, since it is larger than the sum of its proper divisors (649317).

51021043363 is an equidigital number, since it uses as much as digits as its factorization.

51021043363 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 649316.

The product of its (nonzero) digits is 6480, while the sum is 28.

Adding to 51021043363 its reverse (36334012015), we get a palindrome (87355055378).

The spelling of 51021043363 in words is "fifty-one billion, twenty-one million, forty-three thousand, three hundred sixty-three".