51053421004 has 18 divisors (see below), whose sum is σ = 94908135140. Its totient is φ = 24025138752.

The previous prime is 51053420959. The next prime is 51053421037. The reversal of 51053421004 is 40012435015.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 51053421004.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 22080774 + ... + 22083085.

Almost surely, 2^51053421004 is an apocalyptic number.

It is an amenable number.

51053421004 is a deficient number, since it is larger than the sum of its proper divisors (43854714136).

51053421004 is a wasteful number, since it uses less digits than its factorization.

51053421004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44163897 (or 44163878 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 25.

Adding to 51053421004 its reverse (40012435015), we get a palindrome (91065856019).

The spelling of 51053421004 in words is "fifty-one billion, fifty-three million, four hundred twenty-one thousand, four".