51125213155013 has 8 divisors (see below), whose sum is σ = 51473496187776. Its totient is φ = 50777057826000.

The previous prime is 51125213154997. The next prime is 51125213155057. The reversal of 51125213155013 is 31055131252115.

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 51125213155013 - 2⁴ = 51125213154997 is a prime.

It is a super-2 number, since 2×51125213155013² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51125213155063) 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, 31122458 + ... + 32723963.

It is an arithmetic number, because the mean of its divisors is an integer number (6434187023472).

Almost surely, 2^{51125213155013} is an apocalyptic number.

It is an amenable number.

51125213155013 is a deficient number, since it is larger than the sum of its proper divisors (348283032763).

51125213155013 is a wasteful number, since it uses less digits than its factorization.

51125213155013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63851875.

The product of its (nonzero) digits is 22500, while the sum is 35.

The spelling of 51125213155013 in words is "fifty-one trillion, one hundred twenty-five billion, two hundred thirteen million, one hundred fifty-five thousand, thirteen".