51020443551 has 16 divisors (see below), whose sum is σ = 84813205248. Its totient is φ = 26504126400.

The previous prime is 51020443541. The next prime is 51020443567. The reversal of 51020443551 is 15534402015.

It is not a de Polignac number, because 51020443551 - 2⁷ = 51020443423 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51020443511) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 110433630 + ... + 110434091.

It is an arithmetic number, because the mean of its divisors is an integer number (5300825328).

Almost surely, 2^51020443551 is an apocalyptic number.

51020443551 is a deficient number, since it is larger than the sum of its proper divisors (33792761697).

51020443551 is a wasteful number, since it uses less digits than its factorization.

51020443551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 220867742.

The product of its (nonzero) digits is 12000, while the sum is 30.

Adding to 51020443551 its reverse (15534402015), we get a palindrome (66554845566).

The spelling of 51020443551 in words is "fifty-one billion, twenty million, four hundred forty-three thousand, five hundred fifty-one".