51171558541 has 8 divisors (see below), whose sum is σ = 51322160120. Its totient is φ = 51021176832.

The previous prime is 51171558539. The next prime is 51171558553. The reversal of 51171558541 is 14585517115.

It can be written as a sum of positive squares in 4 ways, for example, as 594441 + 51170964100 = 771^2 + 226210^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 51171558541 - 2¹ = 51171558539 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 (51171558511) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 417121 + ... + 525673.

It is an arithmetic number, because the mean of its divisors is an integer number (6415270015).

Almost surely, 2^51171558541 is an apocalyptic number.

It is an amenable number.

51171558541 is a deficient number, since it is larger than the sum of its proper divisors (150601579).

51171558541 is a wasteful number, since it uses less digits than its factorization.

51171558541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109935.

The product of its digits is 140000, while the sum is 43.

It can be divided in two parts, 5117155 and 8541, that added together give a square (5125696 = 2264²).

The spelling of 51171558541 in words is "fifty-one billion, one hundred seventy-one million, five hundred fifty-eight thousand, five hundred forty-one".