51554342301521 has 4 divisors (see below), whose sum is σ = 51673957945344. Its totient is φ = 51434726657700.

The previous prime is 51554342301487. The next prime is 51554342301541. The reversal of 51554342301521 is 12510324345515.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51554342301521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51554342301541) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 59807821265 + ... + 59807822126.

It is an arithmetic number, because the mean of its divisors is an integer number (12918489486336).

Almost surely, 2^{51554342301521} is an apocalyptic number.

It is an amenable number.

51554342301521 is a deficient number, since it is larger than the sum of its proper divisors (119615643823).

51554342301521 is a wasteful number, since it uses less digits than its factorization.

51554342301521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119615643822.

The product of its (nonzero) digits is 360000, while the sum is 41.

The spelling of 51554342301521 in words is "fifty-one trillion, five hundred fifty-four billion, three hundred forty-two million, three hundred one thousand, five hundred twenty-one".