51342554421 has 6 divisors (see below), whose sum is σ = 74161467510. Its totient is φ = 34228369608.

The previous prime is 51342554413. The next prime is 51342554443. The reversal of 51342554421 is 12445524315.

51342554421 is a `hidden beast` number, since 51 + 3 + 42 + 5 + 544 + 21 = 666.

51342554421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 25989953796 + 25352600625 = 161214^2 + 159225^2 .

It is not a de Polignac number, because 51342554421 - 2³ = 51342554413 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51342554401) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2852364126 + ... + 2852364143.

It is an arithmetic number, because the mean of its divisors is an integer number (12360244585).

Almost surely, 2^51342554421 is an apocalyptic number.

It is an amenable number.

51342554421 is a deficient number, since it is larger than the sum of its proper divisors (22818913089).

51342554421 is a wasteful number, since it uses less digits than its factorization.

51342554421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5704728275 (or 5704728272 counting only the distinct ones).

The product of its digits is 96000, while the sum is 36.

The spelling of 51342554421 in words is "fifty-one billion, three hundred forty-two million, five hundred fifty-four thousand, four hundred twenty-one".