51056005501 has 8 divisors (see below), whose sum is σ = 51476933880. Its totient is φ = 50635776768.

The previous prime is 51056005453. The next prime is 51056005523. The reversal of 51056005501 is 10550065015.

It can be written as a sum of positive squares in 4 ways, for example, as 50041476 + 51005964025 = 7074^2 + 225845^2 .

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 51056005501 - 2¹⁵ = 51055972733 is a prime.

It is a super-2 number, since 2×51056005501² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 51056005501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51056005571) 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, 27856 + ... + 320761.

It is an arithmetic number, because the mean of its divisors is an integer number (6434616735).

Almost surely, 2^51056005501 is an apocalyptic number.

It is an amenable number.

51056005501 is a deficient number, since it is larger than the sum of its proper divisors (420928379).

51056005501 is a wasteful number, since it uses less digits than its factorization.

51056005501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 349823.

The product of its (nonzero) digits is 3750, while the sum is 28.

The spelling of 51056005501 in words is "fifty-one billion, fifty-six million, five thousand, five hundred one".