51029214881 has 4 divisors (see below), whose sum is σ = 51139429632. Its totient is φ = 50919000132.

The previous prime is 51029214839. The next prime is 51029214911. The reversal of 51029214881 is 18841292015.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 51029214881 - 2¹⁴ = 51029198497 is a prime.

It is a super-2 number, since 2×51029214881² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51029214281) 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, 55106681 + ... + 55107606.

It is an arithmetic number, because the mean of its divisors is an integer number (12784857408).

Almost surely, 2^51029214881 is an apocalyptic number.

It is an amenable number.

51029214881 is a deficient number, since it is larger than the sum of its proper divisors (110214751).

51029214881 is a wasteful number, since it uses less digits than its factorization.

51029214881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110214750.

The product of its (nonzero) digits is 46080, while the sum is 41.

The spelling of 51029214881 in words is "fifty-one billion, twenty-nine million, two hundred fourteen thousand, eight hundred eighty-one".