51138055222579 has 8 divisors (see below), whose sum is σ = 55198938277952. Its totient is φ = 47095341667200.

The previous prime is 51138055222537. The next prime is 51138055222589. The reversal of 51138055222579 is 97522255083115.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51138055222579 is a prime.

It is a super-2 number, since 2×51138055222579² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51138055222589) 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, 4542369147 + ... + 4542380404.

It is an arithmetic number, because the mean of its divisors is an integer number (6899867284744).

Almost surely, 2^{51138055222579} is an apocalyptic number.

51138055222579 is a deficient number, since it is larger than the sum of its proper divisors (4060883055373).

51138055222579 is a wasteful number, since it uses less digits than its factorization.

51138055222579 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9084749997.

The product of its (nonzero) digits is 7560000, while the sum is 55.

The spelling of 51138055222579 in words is "fifty-one trillion, one hundred thirty-eight billion, fifty-five million, two hundred twenty-two thousand, five hundred seventy-nine".