51551482323421 has 16 divisors (see below), whose sum is σ = 56064808614400. Its totient is φ = 47220955948800.

The previous prime is 51551482323409. The next prime is 51551482323457. The reversal of 51551482323421 is 12432328415515.

It is a cyclic number.

It is not a de Polignac number, because 51551482323421 - 2⁷ = 51551482323293 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 (51551482323461) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38096640 + ... + 39426601.

It is an arithmetic number, because the mean of its divisors is an integer number (3504050538400).

Almost surely, 2^{51551482323421} is an apocalyptic number.

It is an amenable number.

51551482323421 is a deficient number, since it is larger than the sum of its proper divisors (4513326290979).

51551482323421 is a wasteful number, since it uses less digits than its factorization.

51551482323421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77524420.

The product of its digits is 1152000, while the sum is 46.

The spelling of 51551482323421 in words is "fifty-one trillion, five hundred fifty-one billion, four hundred eighty-two million, three hundred twenty-three thousand, four hundred twenty-one".