51431455420 has 24 divisors (see below), whose sum is σ = 108040335984. Its totient is φ = 20566052736.

The previous prime is 51431455337. The next prime is 51431455423. The reversal of 51431455420 is 2455413415.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51431455423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 343249 + ... + 469768.

It is an arithmetic number, because the mean of its divisors is an integer number (4501680666).

Almost surely, 2^51431455420 is an apocalyptic number.

It is an amenable number.

51431455420 is an abundant number, since it is smaller than the sum of its proper divisors (56608880564).

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

51431455420 is a wasteful number, since it uses less digits than its factorization.

51431455420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 816189 (or 816187 counting only the distinct ones).

The product of its (nonzero) digits is 48000, while the sum is 34.

Adding to 51431455420 its reverse (2455413415), we get a palindrome (53886868835).

The spelling of 51431455420 in words is "fifty-one billion, four hundred thirty-one million, four hundred fifty-five thousand, four hundred twenty".