51337100557 has 4 divisors (see below), whose sum is σ = 51431994076. Its totient is φ = 51242207040.

The previous prime is 51337100519. The next prime is 51337100579. The reversal of 51337100557 is 75500173315.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 17591777956 + 33745322601 = 132634^2 + 183699^2 .

It is a cyclic number.

It is not a de Polignac number, because 51337100557 - 2³⁵ = 16977362189 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 (51337100587) 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, 47445948 + ... + 47447029.

It is an arithmetic number, because the mean of its divisors is an integer number (12857998519).

Almost surely, 2^51337100557 is an apocalyptic number.

It is an amenable number.

51337100557 is a deficient number, since it is larger than the sum of its proper divisors (94893519).

51337100557 is an equidigital number, since it uses as much as digits as its factorization.

51337100557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94893518.

The product of its (nonzero) digits is 55125, while the sum is 37.

The spelling of 51337100557 in words is "fifty-one billion, three hundred thirty-seven million, one hundred thousand, five hundred fifty-seven".