51016454021 has 12 divisors (see below), whose sum is σ = 55941958080. Its totient is φ = 46495996560.

The previous prime is 51016453991. The next prime is 51016454029. The reversal of 51016454021 is 12045461015.

51016454021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 51016454021 - 2²² = 51012259717 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51016454029) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1897235 + ... + 1923936.

It is an arithmetic number, because the mean of its divisors is an integer number (4661829840).

Almost surely, 2^51016454021 is an apocalyptic number.

It is an amenable number.

51016454021 is a deficient number, since it is larger than the sum of its proper divisors (4925504059).

51016454021 is a wasteful number, since it uses less digits than its factorization.

51016454021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3821276 (or 3821263 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 29.

The spelling of 51016454021 in words is "fifty-one billion, sixteen million, four hundred fifty-four thousand, twenty-one".