51021134553 has 16 divisors (see below), whose sum is σ = 72043122816. Its totient is φ = 32007356160.

The previous prime is 51021134551. The next prime is 51021134609. The reversal of 51021134553 is 35543112015.

It is not a de Polignac number, because 51021134553 - 2¹ = 51021134551 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 51021134553.

It is not an unprimeable number, because it can be changed into a prime (51021134551) 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 15 ways as a sum of consecutive naturals, for example, 195675 + ... + 374607.

It is an arithmetic number, because the mean of its divisors is an integer number (4502695176).

Almost surely, 2^51021134553 is an apocalyptic number.

It is an amenable number.

51021134553 is a deficient number, since it is larger than the sum of its proper divisors (21021988263).

51021134553 is a wasteful number, since it uses less digits than its factorization.

51021134553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 184544.

The product of its (nonzero) digits is 9000, while the sum is 30.

Adding to 51021134553 its reverse (35543112015), we get a palindrome (86564246568).

The spelling of 51021134553 in words is "fifty-one billion, twenty-one million, one hundred thirty-four thousand, five hundred fifty-three".