51421404424 has 64 divisors (see below), whose sum is σ = 104422348800. Its totient is φ = 23598310656.

The previous prime is 51421404413. The next prime is 51421404427. The reversal of 51421404424 is 42440412415.

It is not an unprimeable number, because it can be changed into a prime (51421404427) 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, 17859417 + ... + 17862295.

It is an arithmetic number, because the mean of its divisors is an integer number (1631599200).

Almost surely, 2^51421404424 is an apocalyptic number.

It is an amenable number.

51421404424 is an abundant number, since it is smaller than the sum of its proper divisors (53000944376).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51421404424 is a wasteful number, since it uses less digits than its factorization.

51421404424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3814 (or 3810 counting only the distinct ones).

The product of its (nonzero) digits is 20480, while the sum is 31.

Adding to 51421404424 its reverse (42440412415), we get a palindrome (93861816839).

The spelling of 51421404424 in words is "fifty-one billion, four hundred twenty-one million, four hundred four thousand, four hundred twenty-four".